Pricing and payment
How much does it cost to have a technician look at my furnace or AC?
A service call is a $79 trip charge. The technician finds the problem and gives you a written, flat-rate price for the repair before doing any work. If you approve the repair, the $79 is waived. If you decide not to go ahead, the $79 is all you owe. The price is the same in every town we serve.
Do you charge more for towns farther from the Twin Cities?
No. A service call in Red Wing, Monticello or Hudson carries the same $79 trip charge as one in Minneapolis, waived when you approve the repair, and there's no mileage fee added for distance. Tune-ups and repairs are priced the same way everywhere we go, in Minnesota and in Western Wisconsin. The full list of towns is on our service areas page.
How much is a furnace or AC tune-up?
A furnace tune-up or an AC tune-up starts at $129. If you want both done in one visit, the combined furnace and AC tune-up is $219. Maintenance visits generally run $129–$349, depending on the equipment and what's attached to it. A boiler or a system with a humidifier and air cleaner takes more time than a basic furnace. Maintenance plans are available on request. See maintenance and tune-ups for more.
What does a new furnace or air conditioner cost installed?
Our published ranges: furnace replacement $4,500–$9,500 (roughly $4,500–$6,000 for an 80% AFUE furnace and $6,500–$9,500 for a 96–98% model), central AC $5,200–$9,800, heat pumps $7,500–$14,500 and ductless mini-splits $4,200–$12,500. Where your job lands depends on the equipment, venting, ductwork and what the house needs. You get a written quote before any work starts. More detail is on our pricing page.
What forms of payment do you take?
We take cash, checks and credit cards. Financing is available on new installs, which helps when a furnace quits in January and a replacement wasn't in this year's budget. We don't list financing rates or terms on the site. Ask about them when we give you the written quote for the install, and compare them against paying another way.
Will I know the price before the work starts?
Yes. For repairs, the technician gives you a flat-rate price in writing after the diagnosis and before touching anything, and nothing happens until you approve it. Because the price is flat-rate, a repair that takes longer than expected doesn't cost you more. For replacements, you get a written quote based on a Manual J load calculation for your house.
Scheduling and service area
What are your hours?
We're open seven days a week, 7am to 9pm, weekends included. No-heat calls get priority on the schedule, since a Minnesota house loses heat fast on a below-zero night. If you smell gas or your carbon monoxide alarm goes off, get everyone outside and call 911 or your gas utility first, then call us at 612-429-3465.
How soon can a technician get to my house?
It depends on the day and the season. The first sub-zero week in January or the first run of 90-degree days in June fills the schedule fast. No-heat calls get priority, and when you call 612-429-3465 we'll give you the earliest time we have open. Calling earlier in the day gives you the best chance at an earlier visit.
Which towns do you serve?
We serve Minneapolis and Saint Paul plus about 50 miles around: the Twin Cities metro, Lake Minnetonka and the west metro, the Crow River and Carver County towns, the I-94 and Highway 10 towns out to Monticello and Becker, southern river towns like Northfield, Le Sueur and Red Wing, and Western Wisconsin around Hudson, River Falls and Prescott. Every town has its own page on our service areas list.
Do you work in Wisconsin?
Yes. We're licensed in Wisconsin as well as Minnesota and serve Hudson, River Falls, Prescott and the Town of Oak Grove, with the same $79 trip charge and pricing as on the Minnesota side. Rebates work differently across the river: Focus on Energy is Wisconsin's statewide efficiency program, alongside your electric or gas utility. See our Hudson page for more.
What should I have ready when I call?
Your town, the type of equipment (furnace, boiler, air conditioner, heat pump or mini-split) and what it's doing. If you can, read the brand and model number off the label inside the furnace door or on the outdoor unit, and note any blinking light code on the control board. A rough age helps too. That lets the technician bring the most likely parts on the first trip.
Do you work on commercial buildings?
Yes, light-commercial work: rooftop units, commercial furnaces and ductless mini-splits for restaurants, offices, retail spaces and multifamily buildings. When you call, tell us what the building is used for, the make of the units and how many there are, and we'll set up a visit. More on our commercial HVAC page.
Repairs and warranties
What warranty comes with a repair?
Completed repairs come with a written 1-year parts-and-labor warranty. If a part we installed fails within that year, we come back and fix it without charging you for the part or the labor. Keep the invoice somewhere you can find it, since it lists what was done and when, and that makes a warranty call quick.
What warranty comes with a new install?
Our installs carry a 2-year labor warranty from us, on top of the manufacturer's parts warranty. Many manufacturers require you to register new equipment online, often within 60 days of installation, to get their longer parts warranty, so check the current registration terms for your brand and don't let that window slip. Keep the model and serial numbers with your paperwork.
Should I repair my furnace or replace it?
Age and the type of failure decide most of these. We'd usually repair a 9-year-old furnace with a bad inducer motor, and usually recommend replacing a 22-year-old furnace with a cracked heat exchanger. In between, weigh the repair price against the furnace's age and how often it has needed work. Replacement price ranges are in our furnace cost guide.
Do you work on my brand of furnace or air conditioner?
Yes. We service every major brand: furnaces and air conditioners from Carrier, Trane, Lennox, Goodman, Rheem, York and the rest, mini-splits from Mitsubishi, Daikin, Fujitsu and LG, boilers from Weil-McLain, Burnham, Navien and others, and thermostats and air quality equipment. Many brands share a parent company and parts. The brands page has a page for each one; if yours isn't there, call and ask.
What does it mean if my furnace was red-tagged?
A red tag means a technician or the gas utility found the furnace unsafe to run and shut off its gas. The usual reasons are a cracked heat exchanger, carbon monoxide spilling into the house, or a venting problem. Don't turn it back on. Have the problem confirmed and fixed, or replace the furnace if the heat exchanger is cracked. Our heat exchanger guide covers the warning signs.
Can you recharge my old R-22 air conditioner?
Sometimes, but it's rarely a good deal. R-22 production and import ended January 1, 2020, so the only refrigerant available is reclaimed or stockpiled, and it's expensive. If the system is leaking, you'll be paying for it again next summer. On an older R-22 unit with a leak, replacement usually makes more sense. Our R-22 guide walks through the options.
Replacements and rebates
How do you decide what size furnace or AC I need?
We do a Manual J load calculation, the industry-standard method for working out a house's heating and cooling needs room by room. It accounts for insulation, windows, air leakage, which way the house faces and the local design temperature. We don't just match the old nameplate, because the old unit may never have been sized right, and an oversized system short-cycles and handles humidity poorly.
Are there rebates for a new furnace, AC or heat pump?
Often, through your utility. Xcel Energy, CenterPoint Energy, Minnesota Energy Resources and many electric co-ops and municipal utilities run rebate programs, and Focus on Energy covers Wisconsin. Amounts and rules change every year, so check your utility's current program instead of trusting an old number. We help with the rebate paperwork on qualifying installs. Our rebate guide has more.
Has the federal tax credit for heat pumps and furnaces ended?
Yes. The federal 25C Energy Efficient Home Improvement Credit ended for equipment placed in service after December 31, 2025, under a law signed in July 2025. It used to cover heat pumps, central air, furnaces and boilers. The 25D credit for geothermal and other residential clean energy ended at the same time. Utility rebates are a separate thing and still run, so check your utility for this year's program.
Should I switch from an 80% furnace to a 96% furnace?
With a heating season as long as Minnesota's, the extra efficiency pays back faster than it would farther south. The catch is venting: a 96–98% furnace vents through PVC out a side wall or the roof, needs a condensate drain, and can leave a gas water heater orphaned in the old chimney. Installed, an 80% furnace runs roughly $4,500–$6,000 and a 96–98% model $6,500–$9,500. See AFUE explained.
Do I need a permit to replace my furnace or air conditioner?
Normally, yes. Replacing a furnace, boiler, air conditioner or heat pump usually requires a mechanical permit from the city, or from the county or state where the city has no building department of its own. The permit brings an inspection, which is a second set of eyes on the gas piping, venting and electrical work. Our permit guide has more.
What refrigerant do new air conditioners use?
New residential central air and heat pump systems now ship with lower-GWP refrigerants, mainly R-454B or R-32, under the EPA's AIM Act rules. They replace R-410A, which is still in a lot of working systems and can still be repaired and recharged. The refrigerants aren't interchangeable, so a new R-454B or R-32 outdoor unit needs an indoor coil built for that refrigerant.
Heat pumps and mini-splits
Do heat pumps work in a Minnesota winter?
Cold-climate models do. They keep producing heat well below zero; Mitsubishi, for example, rates its Hyper-Heat units to run down to -13°F. Their capacity drops as it gets colder, so most Minnesota installs keep a backup: a gas or propane furnace (dual fuel) or electric heat. The heat pump carries fall, spring and milder winter days, and the backup covers the coldest nights. More in our cold-climate guide.
What is a dual-fuel system?
It's a heat pump paired with a gas or propane furnace. The heat pump heats the house until the outdoor temperature drops below a switchover point set at install, then the furnace takes over. In summer the heat pump is your air conditioner. It's a common way to add a heat pump to a home that already has a good furnace, and it keeps a flame-fired backup for the coldest weeks. See our dual-fuel guide.
Can a heat pump cut my propane bill?
It can, especially outside town gas lines where propane is the main heat. A heat pump covers much of the heating season on electricity, and the propane furnace only runs in the deep cold. How much you save depends on what you pay for propane and electricity, and on whether your electric co-op offers a special rate for heat pumps or dual fuel. See propane to heat pump.
Why is my heat pump steaming and blowing cool air in winter?
It's probably in defrost. Frost builds up on the outdoor coil in cold weather, and every so often the heat pump reverses for a few minutes to melt it off. The outdoor fan stops, steam rises off the unit, and backup heat usually comes on inside to cover the gap. That's normal. A unit that stays coated in ice and never clears is not. See heat pump defrost.
How much does a ductless mini-split cost?
Installed, ductless mini-splits run $4,200–$12,500 with us. A single-zone system for one room sits toward the low end; a multi-zone system with several indoor heads sits toward the top. They fit additions, three-season porches being turned into year-round rooms, bedrooms over a garage, and older homes heated by a boiler with no ductwork for air conditioning. More on our mini-split page.
How many indoor units does a mini-split system need?
Usually one head per room or open area you want to heat and cool. A big open main floor might need one or two heads; closed-off bedrooms each need their own, because a head can't push air around corners and down hallways well. One outdoor unit can feed several heads, but separate single-zone systems are sometimes the better choice. See our multi-zone layout guide.
Maintenance and air quality
How often should my furnace and AC be serviced?
Once a year each: the furnace in the fall before the first cold snap, the air conditioner in spring before the heat. A furnace or AC tune-up starts at $129, or $219 for both in one visit. A heat pump runs in both seasons and piles up more hours than a furnace or AC alone, so a yearly check matters even more. More on maintenance.
What happens during a furnace tune-up?
A proper furnace tune-up goes after the parts behind most winter no-heat calls. That means checking and cleaning the flame sensor, checking the igniter, inducer motor and pressure switch, inspecting the burners and heat exchanger, checking gas pressure and temperature rise, clearing the condensate trap on a high-efficiency furnace, looking over the venting and checking the filter. See our fall checklist.
How often should I change my furnace filter?
Check it monthly during heating and cooling season. A standard 1-inch filter usually needs changing every one to three months, sooner with pets or during a remodel. A 4- or 5-inch media filter in a cabinet by the furnace typically lasts six months to a year. If you hold it up to a light and can't see through it, change it. A clogged filter can trip the furnace's limit switch.
What indoor humidity should I keep in winter?
Lower as it gets colder outside. Roughly 25–35% works in normal cold weather, and in deep cold it needs to come down further or your windows will sweat and frost over. Water or ice on the inside of the glass is the sign it's too high. A whole-home humidifier with an outdoor temperature sensor adjusts for this on its own. See our humidifier guide.
Where do carbon monoxide alarms need to go?
Minnesota law requires a working carbon monoxide alarm within 10 feet of every room used for sleeping. Adding one on each level, basement included, is a good idea in a house with gas or propane appliances. CO has no smell, and a cracked heat exchanger, blocked flue or backdrafting water heater can produce it. Replace alarms by the date printed on them. Details are in our CO alarm guide.
Do I need an HRV or ERV?
If your house is newer and built tight, it probably already has one, since mechanical ventilation is part of how newer Minnesota homes are designed. Older, leakier houses usually don't need one unless they've been heavily air-sealed. An HRV swaps heat between outgoing and incoming air and tends to dry a house out a little, which helps with sweating windows. An ERV also moves some moisture. See HRV vs ERV.
Heating and cooling questions, answered
Every question below has a full guide behind it. The short answer is here; the guide has the steps, the costs and the Minnesota detail.
Heating
- Can a furnace leak carbon monoxide? Yes. A furnace that burns gas, propane or oil makes carbon monoxide, and it can reach your rooms through a cracked heat exchanger, a blocked, leaking or disconnected vent, or exhaust backdrafting into the house.
- Do you do furnace repair in Prescott, Wisconsin? Yes. We're licensed in Wisconsin and repair furnaces in Prescott, the Town of Oak Grove and River Falls, at the same prices as the Twin Cities.
- How do I clear a frozen furnace vent pipe? Turn the thermostat off, clear snow from both PVC pipes by hand, and gently break off any ice ring at the opening.
- How do I fix a frozen condensate line on my furnace? Turn the thermostat off, find where the drain line runs through cold space or leaves the house, and thaw that section with a hair dryer on low or warm, wet towels, never a torch.
- How do I know if my furnace heat exchanger is cracked? You usually can't confirm it yourself: a technician has to see the crack, often with an inspection camera, and back it up with flame behavior and carbon monoxide readings.
- How long does a furnace last in Minnesota? Most gas furnaces last about 15–20 years, according to manufacturers Carrier and Lennox, and ENERGY STAR suggests considering replacement once a furnace passes 15.
- How long does a furnace replacement take? A straight furnace swap, same location and same type of venting, is usually a one-day job, and Lennox puts most installs at 4 to 10 hours.
- How much does it cost to convert from oil to natural gas heat? Converting from oil to natural gas typically costs $6,000–$20,000 nationally, per HomeGuide: $6,000–$12,000 when a gas line already reaches the house and $12,000–$20,000 when one has to be run.
- How much does it cost to heat a Minnesota home with propane? Your cost is your price per gallon times the gallons you burn: a 96% furnace uses about 11.4 gallons per million BTU of heat delivered, an 80% furnace about 13.7.
- How much does it cost to run a gas line for a furnace or garage heater? National cost guides such as HomeGuide put a typical gas line run at $350–$2,000: about $350–$800 to extend an existing line to a nearby appliance and $500–$2,000 for a new line from the meter to one appliance.
- Is a 98% AFUE furnace worth it over a 96% furnace in Minnesota? On gas savings alone, rarely: going from 96% to 98% AFUE cuts furnace gas use by about 2%, while 80% to 95% or better cuts it by about a sixth.
- Is a Bryant Evolution furnace worth it over a Legacy? A Bryant Evolution is worth it over a Legacy if you'll stay put and want steadier, quieter heat; the gain is mostly comfort, not gas savings.
- Is an outdoor wood boiler cheaper than a gas furnace in Minnesota? Usually not if natural gas reaches your house: counting bought cordwood or your own hours, a 95%-plus gas furnace is simpler and usually cheaper.
- Is radiant floor heating better than baseboard heat in Minnesota? Radiant floor heat is usually better for slabs, basements and new additions: it's more comfortable, and its low water temperature lets a condensing boiler run at its most efficient.
- Should a Saint Paul home with a boiler switch to a furnace? Usually not: if a Saint Paul home's radiators and piping are sound, a new boiler keeps the quiet, even heat and avoids cutting ducts into plaster walls.
- Should I buy a Trane or a Carrier furnace in Minnesota? Either brand makes a good furnace for a Minnesota house, so pick the tier and the installer first and the brand last.
- Should I buy Carrier, Trane or Lennox for a Minnesota home? Any of the three is a sound buy; pick the installer first and the tier second.
- What do furnace noises mean? Most furnace noises point to one part: a bang at startup is delayed ignition, a squeal is a worn motor, scraping is a blower wheel rubbing, a loud hum is a motor that can't start and a whistle is restricted airflow.
- What does a boiler expansion tank do, and how do you know it's failing? An expansion tank gives the water in a closed hot-water heating system room to grow as it heats, so pressure stays below the relief valve's setting.
- What does a furnace pressure switch do, and why does it keep tripping? A furnace pressure switch confirms the inducer motor is pulling exhaust out the vent before the gas valve can open.
- What does it mean when a furnace is red-tagged? A red tag means a gas utility worker or heating technician judged your furnace unsafe to run, shut off its gas, and tagged it so nobody restarts it.
- What does the blinking light on my furnace mean? The blinking light is the status LED on the furnace control board, and the number or pattern of flashes is a fault code.
- What is a communicating HVAC system, and is it worth it? A communicating HVAC system links the thermostat, furnace or air handler and outdoor unit with a two-way data connection, so the equipment reports its status and the control fine-tunes staging, airflow and humidity.
- What is a furnace inducer motor, and what are the signs it's failing? The inducer motor is a small fan that runs first when your furnace starts, pushing exhaust through the heat exchanger and out the vent.
- What is a Manual J load calculation, and why should an HVAC quote include one? A Manual J load calculation is ACCA's standard method for working out how much heat a house loses on a cold design day and gains on a hot one, from its insulation, windows, air leakage and layout.
- What is an orphaned water heater, and why can a new furnace mean a chimney liner? An orphaned water heater is a gas water heater left venting alone into a chimney it used to share with an 80% furnace.
- What is static pressure in HVAC, and why does it matter? Static pressure is the resistance the furnace blower pushes against as it moves air through the filter, coil and ducts, measured in inches of water column.
- What is the best furnace brand for a Minnesota winter? No single brand is best; in a Minnesota house the furnace type and the install matter more than the name.
- What is the best garage heater for a Minnesota winter? For an insulated garage you heat often, a vented gas unit heater is usually the best pick because it recovers fast after the door opens.
- What is the quietest gas furnace for a Minnesota home? The quietest gas furnaces are modulating models with variable-speed blowers and insulated cabinets, such as the Lennox SLP99V, Carrier Infinity 98 and Trane XC95m.
- What should I check when my furnace stops heating in winter? Check the thermostat first (Heat mode, setpoint above room temperature, fresh batteries), then the breaker, the furnace switch, the filter, the lower door and the outdoor PVC vents.
- What should I set my thermostat to in a Minnesota winter? The Department of Energy suggests about 68–70°F while you're home and awake, and lower while you sleep or are out.
- What size furnace do I need for a Minnesota house? The furnace size a Minnesota house needs comes from a Manual J heat loss calculation at the local winter design temperature, which is -15°F for Minneapolis/St. Paul in the state energy code.
- Which Lennox furnace series is best for a Minnesota home? For most Minnesota homes, pick a two-stage Lennox with a variable-speed blower at 96–97% AFUE, such as the EL296V, EL297V or ML297V.
- Why does my furnace keep turning on and off? A furnace that keeps turning on and off is usually losing its flame to a dirty flame sensor, overheating on its limit switch from poor airflow, or oversized or poorly controlled by its thermostat.
- Why does my furnace limit switch keep tripping? Almost always because the furnace is overheating from too little airflow: a clogged filter, closed registers, a blocked return, a dirty AC coil above the furnace, or a weak blower.
- Why does my furnace smell like burning? Usually it's dust burning off the burners and heat exchanger on the first cold days, and that fades within a few cycles.
- Why is my boiler banging or making a kettle noise? Kettling, a rumble or tea-kettle hiss, is water flashing to steam inside a hot-water boiler from scale, sludge or weak flow; banging in a steam system is water hammer from trapped condensate.
- Why is my furnace blowing cold air? A furnace blows cold air most often because the thermostat fan is set to On, or because the burners have shut off: a clogged filter tripping the limit switch, a dirty flame sensor, or a snow-blocked vent or frozen drain.
- Why is my furnace leaking water? A furnace leaks water when a drain fails. On a 90%+ furnace, that's usually a clogged condensate trap or line, a dead condensate pump or a frozen drain line.
- Why is my thermostat screen blank, and is the furnace or AC still working? A blank thermostat screen almost always means the thermostat has lost power: dead batteries, a furnace switch or breaker that's off, a blown low-voltage fuse on the furnace board, or a condensate safety switch cutting power.
- Why won't my furnace ignite? A furnace won't ignite because one startup step has failed, and where it stops points to the part: no inducer means power or the thermostat, inducer without igniter glow means a blocked vent or condensate trap, glow without flame means gas or the gas valve, and flame that drops out means the flame sensor.
Cooling
- Does the furnace need to be on for the AC to work? Yes, the furnace has to be switched on for central air to work, though its burners stay off.
- How can I tell if my AC evaporator coil is leaking? Signs of a leaking evaporator coil are an AC that runs long without cooling the house, ice on the larger insulated copper line or the coil, and a system that needs refrigerant every year.
- How do I clear a clogged AC condensate drain? Turn the cooling off, find the source of the water, and clear the line: flush it through the cleanout, or pull the clog out from the far end with a wet/dry vacuum.
- How do you figure out what size central air conditioner a Twin Cities home needs? A Twin Cities home's central AC size should come from a Manual J load calculation, which models the walls, windows, insulation, air leakage and sun exposure room by room.
- How long does a central air conditioner last in Minnesota? Most central air conditioners last about 15–20 years, according to Carrier and Lennox, and ENERGY STAR suggests considering replacement once a system passes 10 years.
- How many tons of air conditioning does a Minneapolis house need? A Minneapolis house needs the size a Manual J load calculation gives, on a half-ton step between about 1.5 and 5 tons, and square footage can't tell you which.
- Is a high-velocity air conditioning system a good choice for an older Minnesota home without ducts? It can be, when you want whole-house central cooling in a boiler-heated house without wall heads or big new ducts; small tubing snakes through walls to small outlets.
- Is a two-stage or a variable-speed air conditioner better for a Minnesota home? For most Minnesota homes, two-stage AC is the better value: it runs on low most of the summer and pulls humidity out on muggy days.
- Is Rheem or Goodman the better air conditioner for a Minnesota home? Neither is better outright: both sell basic single-stage through variable-speed models, Goodman usually quotes lower at the same tier, and Rheem competes a step up.
- Should a Minnesota home get a ductless mini-split or central air conditioning? Get central AC if the house already has a forced-air furnace with decent ductwork, and a ductless mini-split if it has no ducts, as in many boiler homes, or one room the ducts never reach.
- Should I repair or replace an R-22 air conditioner in Minnesota? Repair an R-22 AC when the fault is electrical (capacitor, contactor, fan motor) or a small, findable leak; replace it when the indoor coil leaks, the compressor fails or the leak can't be found.
- What are R-454B and R-32, and what does the refrigerant change mean for my AC? R-454B and R-32 are the refrigerants in most new central air conditioners and heat pumps, replacing R-410A under EPA's AIM Act rules.
- What is SEER2, and how is it different from SEER? SEER2 is the seasonal cooling efficiency rating the Department of Energy has required since January 1, 2023.
- What is the best central air conditioner brand for Minnesota? No brand wins outright; a correctly sized two-stage or variable-speed unit from any major maker, matched to your furnace and coil, gives the best comfort here.
- What should River Falls homeowners know before installing a new air conditioner? Size the new AC with a Manual J load calculation, match it to your furnace blower and coil, and plan for the mechanical permit.
- What's the difference between Carrier Comfort and Performance air conditioners? Carrier's Comfort air conditioners (Comfort 14 and 16) are basic single-stage units, while the Performance line adds a quieter single-stage Performance 16 and the two-stage Performance 18, which runs long low-speed cycles that pull more humidity out of the air.
- Why does my air conditioner smell like dirty socks? A dirty-sock smell usually means bacteria and mold growing in the dust and water film on the indoor evaporator coil, or in a drain pan that holds water.
- Why is my AC condenser humming? An AC condenser hums because its compressor and fan motors are running, which is normal, or because one is trying to start and can't, usually from a failed capacitor, seized fan motor or worn contactor.
- Why is my AC freezing up, with ice on the lines or the indoor coil? An AC freezes up when the indoor coil gets colder than 32°F, which happens when too little warm air crosses it (a clogged filter, closed registers, a weak blower) or when refrigerant is low from a leak.
- Why is my AC leaking water inside the house? An AC leaks water inside when the water its coil pulls from the air can't reach the drain: a clogged trap or line, a failed condensate pump, a frozen coil overflowing its pan, or a cracked pan.
- Why is my air conditioner running but not cooling the house? An AC that runs but won't cool usually has a clogged filter or iced coil, a dirty outdoor coil, a failed capacitor or fan motor, or a refrigerant leak.
- Why is the fan on my outdoor AC unit not spinning? An outdoor AC fan that won't spin, especially while the unit hums, usually has a failed run capacitor, a burned-out fan motor or a bad contactor.
- Why won't my air conditioner turn on? Usually it's power or controls: a blank thermostat, a furnace switch or blower door that's off, a tripped breaker, a pulled outdoor disconnect, or a float switch tripped by a clogged drain.
Heat Pumps
- Do heat pumps work in Minnesota winters? Yes, heat pumps work in Minnesota winters if you buy a cold-climate model and plan backup heat: they keep making heat well below zero, but output drops as it gets colder.
- Do I need a Mitsubishi Hyper-Heat unit, or will a standard Mitsubishi heat pump do? Buy Hyper-Heat if the mini-split has to heat the room in January; Mitsubishi rates it to keep heating down to -13°F, with up to 100% of rated capacity at 5°F.
- Does a heat pump still heat at -20°F? Some cold-climate heat pumps still heat at -20°F, but at reduced output, so on a night that cold most Minnesota systems lean on the furnace or electric backup.
- Does a heat pump water heater make sense in a Minnesota basement? Often, yes, if the basement stays above 40°F and has room. ENERGY STAR calls for a space between 40°F and 90°F with about 1,000 cubic feet of air.
- How does a dual-fuel system decide when to switch from the heat pump to the furnace? The thermostat or control switches at an outdoor temperature you set: above it the heat pump heats the house, below it the furnace takes over.
- How should I lay out a multi-zone mini-split in my house? Give every room with a door you keep closed its own head, size each head to that room's load, then decide whether the heads share one outdoor unit or split across two.
- Is a ductless heat pump worth adding to a house heated by electric baseboard? Usually, yes: a ductless heat pump makes more heat per kilowatt-hour than baseboard whenever it runs, and it adds air conditioning.
- Is it normal for a heat pump to run constantly in winter? Usually, yes. Inverter heat pumps are designed to run for long stretches at low speed instead of cycling on and off, and any heat pump runs nearly nonstop in deep cold.
- Is the Daikin FIT a good heat pump for a Minnesota home? It can be, especially on a tight lot: the FIT is a slim, side-discharge inverter heat pump, and Daikin lists heating down to -10°F for the standard FIT and -20°F for the ENERGY STAR cold-climate FIT Aurora.
- Should a Minnesota house have a heat pump or a gas furnace? For most Minnesota houses with natural gas, the answer is both: a heat pump in place of the air conditioner, with a gas furnace for the coldest weather (dual fuel).
- Should I add a heat pump to my propane-heated house? In many rural Minnesota homes, yes: a cold-climate heat pump added to the propane furnace (dual fuel) carries the milder part of the heating season, so fewer gallons get delivered.
- Should I pick Daikin or Mitsubishi for a mini-split in my Minnesota house? Choose by room, not logo: rooms that must heat in January need a cold-climate outdoor unit from either brand, compared by 5°F capacity; bedrooms need a small, quiet head sized to the room; kneewall rooms often need a floor console.
- Should I replace my electric furnace with a heat pump? In most Minnesota homes, add a heat pump rather than replace the electric furnace: the furnace's blower and elements become the air handler and backup, and the heat pump carries every hour it can.
- Should my mini-split head go high on the wall or low on the floor? Put the head high on the wall if the room mostly needs cooling or has open wall space up high, and use a floor console if it mostly needs heat or its only open wall is a kneewall or the space under a window.
- What are the most common mistakes when buying a heat pump in Minnesota? The most common mistakes are shopping by SEER2 instead of 5°F heating capacity, sizing from the old AC, skipping the backup-heat plan, ignoring the ducts and electrical panel, setting the outdoor unit where snow buries it, and counting on the 25C tax credit, which ended after 2025.
- What do HSPF2 and COP mean on a heat pump, and which numbers matter in a Minnesota winter? HSPF2 is a heat pump's heating efficiency averaged over a season in one reference climate; COP is its efficiency at a single outdoor temperature.
- What is the difference between aux heat and emergency heat on a heat pump thermostat? Aux heat is backup heat the thermostat adds automatically during defrost, after a setpoint increase or when it's too cold for the heat pump alone.
- Why is my heat pump blowing cold air in winter? Often it isn't broken: heat pump air is cooler than furnace air, around 85–100°F versus 120–140°F per Carrier, and it runs cool for a few minutes during defrost.
- Why is my heat pump steaming and making noise in winter? Your heat pump is almost certainly running a defrost cycle, reversing for a few minutes to melt frost off the outdoor coil.
Air Quality
- Are UV lights for HVAC worth it? A UV light is worth it when the problem is mold or slime growing on the wet AC coil and drain pan, the usual source of a musty smell at start-up, and not for dust, pollen, pet dander or general worries about airborne germs.
- Do I need a whole-house dehumidifier in Minnesota? You likely need one if your basement stays above 60% humidity in summer, smells musty, or fills a portable dehumidifier every day, because the AC only dries air while it's cooling and basements rarely call for cooling.
- Does a home HVAC system need a duct smoke detector? Usually not: Minnesota's mechanical code requires duct smoke detectors on return-air systems larger than 2,000 cfm, which is more air than most single-family systems move.
- Does central air conditioning bring in outside air? No, central air recirculates the air already in your house. The blower pulls it through the returns, across the cold coil and back out the registers; the outdoor unit only sheds heat.
- How do I improve indoor air quality in a Minnesota house in winter? Fix moisture first, then filtration, then fresh air: measure humidity and watch the windows, add a humidifier only if the house is dry, run a 4- or 5-inch MERV 13 filter, and give a tight house an HRV or ERV.
- Is air duct cleaning worth the money? Only in specific cases: EPA says to consider it for substantial visible mold inside hard ducts, rodents or insects, or debris blowing out of the registers, and notes cleaning has never been shown to prevent health problems.
- Is duct sealing worth it in a Minnesota house? Usually, when the leaks are in ducts running through unheated space: attics, garages, crawlspaces and exterior walls.
- Is the Lennox PureAir S worth it? It's worth it if odors and chemical smells bother you as much as dust, because PureAir pairs a MERV 16 filter with a UV lamp and catalyst stage aimed at odors and vapors.
- Should a Minnesota house have an HRV or an ERV? It depends which way your house leans in winter: if windows sweat and the house runs humid, an HRV dries it by swapping moist indoor air for dry outdoor air; if it runs dry, an ERV keeps some moisture in.
- What is make-up air, and when does a kitchen range hood need it in Minnesota? Make-up air is outdoor air brought into the house to replace what exhaust fans blow out.
- What MERV rating is best for allergies? MERV 13 is the best rating for most allergy households, as long as your system can breathe through it.
- What's the best whole-home humidifier for a Minnesota house? The best whole-home humidifier for most Minnesota furnaces is a bypass unit with an automatic control that lowers the target as outdoor temperatures drop.
- Where does Minnesota law require carbon monoxide alarms? Minnesota Statutes 299F.51 requires an approved, working carbon monoxide alarm within 10 feet of each room lawfully used for sleeping, in every single-family home and apartment unit.
- Which is better, the Aprilaire 5000 or an Aprilaire 2000-series air purifier? For most Minnesota homes, a 2000-series media cabinet with a MERV 13 filter.
- Why is my furnace filter turning black? A black furnace filter usually means soot, most often from candles, a wood fireplace or smoky cooking, and sometimes from a furnace, water heater or boiler burning dirty.
Maintenance
- Can you run a furnace without a filter? Only briefly. A few hours or one night won't do much harm, but days or weeks let dust coat the blower wheel, the AC coil above the furnace and the heat exchanger, cutting airflow until the furnace overheats or, in summer, the coil freezes.
- How do I clean a furnace flame sensor? Shut off the furnace's power and gas, remove the sensor (one wire, one screw), rub the rod lightly with a fine abrasive pad until the dull film is gone, then reinstall it and watch a full heating cycle.
- How do I clean my outdoor AC unit's coils? Turn the thermostat off and shut off power at the outdoor disconnect and breaker, brush dry debris like cottonwood fluff off the fins, then rinse the coil gently with a garden hose from the top down, never a pressure washer.
- How often should you change your furnace filter in Minnesota? Check a standard 1-inch filter every month during heating and cooling season and change it when it looks dirty, and at least every three months, as ENERGY STAR advises.
- Is an HVAC zoning system worth it in a Minnesota home? It's worth it when separate floors or wings want different temperatures and each has its own duct branch, as in split-levels, bonus rooms and walkout basements.
- Is Honeywell Home or Sensi better for a Minnesota home? For an older home with no C wire, a standard furnace and AC, the Sensi Smart Thermostat is the easier fit because it can power-share; Honeywell Home's X2S and X8S need a C wire or adapter.
- Should I cover my outdoor AC unit in the winter? No, not with a plastic or vinyl wrap, which traps moisture and gives mice a dry nest; the unit is built to sit in snow.
- What HVAC maintenance does a Hudson, WI home need? A furnace tune-up each fall and an AC tune-up each spring, plus filter changes, clear PVC vent pipes and a clear outdoor unit between visits.
- What is a thermostat C-wire and do I need one? The C (common) wire completes the furnace's 24-volt control circuit so a thermostat gets steady power, and most smart thermostats need one, though some borrow power on a standard furnace and AC.
- What is included in a furnace inspection? A real inspection measures things instead of just looking: gas pressure, combustion and carbon monoxide, temperature rise, the flame signal, blower amps, the safety switches, venting and the condensate system, plus a look at the heat exchanger and burners.
- What is the best smart thermostat for a Minnesota home? The best smart thermostat for a Minnesota home is the one that matches your equipment: Ecobee, Google Nest, Honeywell Home and Sensi all run a gas furnace and central AC well.
- What should a spring AC tune-up include? A spring AC tune-up should include a condenser coil rinse, capacitor and contactor tests, a measured refrigerant charge, amp draws on the motors, and airflow and condensate drain checks.
- What should I do before turning on my furnace for the first time in the fall? Put in a new filter, test the carbon monoxide alarms, clear around the furnace and the outdoor vents, then switch to Heat on a mild day and watch one full cycle.
- What should I do to get my furnace ready for winter? Learn where the furnace switch and gas shutoff are, change the filter, clear the furnace area and the outdoor vent pipes, check the condensate drain, test your carbon monoxide alarms, set up the humidifier, and run the heat on a mild day.
- Where is the best place to put a thermostat? Put it on an interior wall at about eye level, in a room you use, where house air moves past it.
- Why is one room in my house always colder or hotter than the rest? One room runs hotter or colder because it gets less air than it needs, loses or gains heat faster than the rest, or both.
Pricing
- Do I need a permit to replace a furnace or AC in Minneapolis or Saint Paul? Yes, in both cities a furnace, boiler, central AC or heat pump replacement needs a city permit, and the installing contractor normally pulls it.
- How do I choose an HVAC contractor in Minneapolis? Pick one with a mechanical contractor bond on file with the Minnesota Department of Labor and Industry and a Minneapolis HVAC license, who sizes the system with a Manual J and puts model numbers, the permit and warranty terms in a written quote.
- How much does a Carrier Infinity heat pump cost in Minnesota? A Carrier Infinity heat pump usually lands in the upper part of our $7,500–$14,500 installed heat pump range in Minnesota, because it's a variable-speed system with a matched indoor unit and a communicating control.
- How much does a geothermal heat pump cost in Minnesota? National cost guides like HomeGuide put a ground-source heat pump system at $20,000–$50,000+ before incentives, with complex jobs past $75,000.
- How much does a Mitsubishi mini-split cost in Hudson, WI? A ductless mini-split installed by us in Hudson runs $4,200–$12,500, the same as on the Minnesota side, with a single-zone Mitsubishi toward the low end and multi-zone Hyper-Heating systems toward the top.
- How much does a new boiler cost in Minnesota? National cost guides such as HomeGuide put a typical gas boiler replacement at $4,000–$9,000 and a high-efficiency boiler at $4,000–$10,000, with standard-efficiency boilers starting around $2,200.
- How much does furnace repair cost in Minnesota? With us, furnace repair starts with a $79 trip charge, waived when you approve the repair, and a written flat-rate price before any work begins.
- How much does it cost to install a heat pump in Minnesota? A ducted heat pump installed by us costs $7,500–$14,500; a ductless mini-split costs $4,200–$12,500.
- How much does it cost to recharge an AC with refrigerant? Per HomeGuide's national figures, an R-410A recharge typically runs $100–$320 at $50–$80 per pound, and R-22 costs $90–$150 per pound.
- How much does it cost to replace a central air conditioner in Minnesota? A central AC replacement with us costs $5,200–$9,800 installed.
- How much does it cost to replace a furnace blower motor? Replacing a furnace blower motor typically costs $500–$1,400 for a PSC motor and $800–$2,300 for a variable-speed ECM motor, per HomeGuide's national cost guide.
- How much does it cost to replace a furnace in Minnesota? A new furnace installed by us in Minnesota costs $4,500–$9,500: roughly $4,500–$6,000 for an 80% AFUE furnace and $6,500–$9,500 for a 96–98% AFUE condensing furnace.
- How much does it cost to replace an AC capacitor? National cost guides like HomeGuide put an AC capacitor replacement at $150–$400, even though the part itself runs about $15–$80.
- Is a high-efficiency air conditioner worth the extra cost in Minnesota? On electricity savings alone, usually not: Minnesota's cooling season is short, so a top-tier system takes a long time to earn back its extra cost.
- Is a tankless water heater worth it in Minnesota? A tankless water heater is worth it in Minnesota when your house runs out of hot water and can take the bigger gas line and new vent it needs; otherwise a like-for-like tank swap usually costs less.
- Is ductless or central air cheaper to install? Central air is usually cheaper to install in a house that already has ducts ($5,200–$9,800 with us), while a ductless mini-split ($4,200–$12,500 with us) is usually cheaper in a house without them, especially for one to three rooms.
- What does it cost to replace the furnace and AC together in Minnesota, and is it cheaper than doing them separately? Replacing both with us costs $9,700–$19,300 installed: our furnace ($4,500–$9,500) and central AC ($5,200–$9,800) ranges added, with no package discount.
Rebates
- Are the federal HVAC tax credits from the Inflation Reduction Act gone, and what's left for Minnesota homeowners? Yes, they're gone: the 25C and 25D federal tax credits ended for equipment placed in service after December 31, 2025.
- How do CenterPoint Energy's furnace rebates work in Minnesota in 2026? CenterPoint Energy pays its Minnesota gas customers a rebate on a qualifying high-efficiency furnace, boiler or combination system installed in 2026, and furnace rebates step up by AFUE tier.
- Is Xcel Energy's AC Rewards program worth joining? Yes for most single-family homes with central air, an eligible smart thermostat and an AC that keeps up on hot days: Xcel pays a one-time enrollment credit and an annual reward, and you can opt out of events.
- What heat pump rebates are available in Minnesota in 2026? Utility rebates are what's available: Xcel Energy, CenterPoint Energy and electric co-ops such as Dakota Electric and Connexus run heat pump programs, each with its own contractor and deadline rules.
- What HVAC rebates and programs are available to Dakota County homeowners? Most come from your utilities: Dakota Electric Association or Xcel Energy for AC and heat pump rebates, and CenterPoint Energy, Xcel Energy or Minnesota Energy Resources for furnace and boiler rebates, depending on your address.
- Which Xcel Energy and CenterPoint Energy rebates apply to my HVAC project in 2026? Furnace and boiler rebates come from your gas utility and AC and heat pump rebates from your electric utility: in Minneapolis, CenterPoint for gas and Xcel for electricity; in Saint Paul, Xcel for both.