Frozen Condensate Line on a High-Efficiency Furnace
Furnace quit in a cold snap and the drain line froze? How it trips the pressure switch, how to thaw it safely, and fixes that keep it from freezing again.
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Heating & Cooling in Maplewood, MN
Maplewood borders Saint Paul on the north and east, and plenty of its homes carry Saint Paul mailing addresses even though the building permits come from the City of Maplewood.
HVAC service in Maplewood, MN
We repair and replace furnaces, air conditioners, heat pumps, boilers and ductless mini-splits in Maplewood and across Ramsey County. Every visit starts with a $79 trip charge and a written price before any work, and the $79 is waived when you go ahead with the repair.
- County
- Ramsey County
- ZIP codes
- 55109, 55117, 55119
- Natural gas
- Xcel Energy
- Electric
- Xcel Energy
- From downtown Minneapolis
- about 13 miles
Updated September 23, 2026
What HVAC problems do we see most in Maplewood?
- Moving 1950s rambler furnaces off the shared chimney to 96% side-wall PVC venting, with a liner or power-vent plan for the water heater
- Matched condenser-and-coil replacements for split-entry central air that has reached its second or third decade
- Adding a lower-level return in split-entries that were built with one central return
- Townhome furnace and AC replacements where the association sets the condenser location
Around town: 3M Center · Maplewood Mall · Keller Golf Course · Battle Creek Regional Park · White Bear Avenue
Book in MaplewoodWhat are Maplewood homes like to heat and cool?
Maplewood already had about 14,000 residents when it incorporated in 1957, two years after 3M finished the first buildings of its research campus here, and it kept growing to about 42,000 by 2020. That long, steady run means nearly every decade since the 1940s is represented. The earliest houses are small, and many have had three or four furnaces in the same basement corner. The 1960s added bigger ramblers with attached garages, and the population was nearly 27,000 by 1980.
The city's shape adds variety. A narrow southern leg runs about seven and a half miles toward Woodbury, and houses there went up over several decades, some on larger lots. Across all of it, one pattern holds: the furnace and AC have been replaced at least once, while the ductwork is still original, sized for the heating equipment of its day and for a house that may not have had central air.
Winter in Maplewood
Older Maplewood ramblers share a winter weak spot at the chimney. Once a house has been tightened with new windows and insulation, a bath fan, dryer or range hood can pull more air out than the house lets back in, and on the coldest days the water heater may spill exhaust at its draft hood instead of sending it up the flue. A smoke or mirror test at the draft hood with the fans running tells you. A CO alarm within 10 feet of each bedroom, which state law requires, is the backstop.
Summer in Maplewood
Split-entries in Maplewood run a two-temperature summer. The upper level catches the sun through the roof and the big front window, while the lower level, half below grade, stays cool and a little damp. The thermostat usually sits upstairs, so the AC runs until the bedrooms are comfortable and the family room downstairs gets cold. Partly closing the lower-level supplies in June and opening them again in October, plus a dehumidifier downstairs, evens it out in most of these houses.
Which utilities and rebates apply in Maplewood?
Because Xcel Energy supplies both gas and electricity in Maplewood, a furnace, AC or heat pump project runs through one utility. Xcel's gas furnace and boiler rebates, and several of its heat pump and AC rebates, point you to participating or registered contractors, so ask whether the rebate you want needs one before you choose an installer. In a 1950s or 60s house, Xcel's insulation and air-sealing rebates are worth using before new equipment is sized, since a tighter house needs less of it.
Rebate programs change every year; check the utility's current terms before you buy. Our guides: Xcel and CenterPoint rebates, heat pump rebates, what happened to the federal credits.
Most-requested in Maplewood
Furnace repair in Maplewood For a Maplewood furnace repair, approve the fix and we waive the $79 trip charge. Furnace replacement in Maplewood Maplewood homeowners pay $4,500–$9,500 installed for a new furnace with us, about $4,500–$6,000 for 80% and $6,500–$9,500 for 96–98% models. AC repair in Maplewood AC repair in Maplewood costs a $79 trip charge to start, waived when you approve the repair, and you'll have the written flat-rate price before any work. AC replacement in Maplewood A new central air conditioner in Maplewood runs $5,200–$9,800 installed.
All services in Maplewood
Maplewood HVAC questions
Who repairs furnaces and air conditioners in Maplewood, MN?
Central Minnesota Heating and Cooling serves Maplewood and the rest of Ramsey County, about 13 miles from downtown Minneapolis. We repair and replace furnaces, central air, heat pumps, boilers and ductless mini-splits, and we're open 7 days, 7am–9pm. Call 612-429-3465.
How much does an HVAC service call cost in Maplewood?
A flat $79 trip charge, waived when you approve the repair. Written price before any work; same prices in every town we serve. Installed prices are on our pricing page.
My Maplewood house has a Saint Paul mailing address. Whose permit rules apply?
The city the house sits in, not the name on the mail. Addresses in 55109, 55117 and 55119 can be inside Maplewood even when the post office says Saint Paul, and Maplewood's own building department issues the mechanical permit for a furnace, boiler or AC replacement. We confirm the city from the property record before filing, so the permit and inspection go through the right office.
What happens to my water heater when my Maplewood furnace goes to a 96% model?
In many Maplewood ramblers the furnace and water heater share one chimney. A 96% furnace vents through PVC out the side of the house, which leaves the water heater alone in a flue sized for two appliances. That flue can run too cool and draft poorly, so we either line the chimney down to the right size or recommend a power-vent water heater. It's written into the quote before any work starts.
Can our older Maplewood rambler take a heat pump without new ductwork?
Often, with some help. A heat pump heats with cooler air than a furnace, so it needs more airflow, and it cools through the same ducts. Heat-only ductwork from the 1950s tends to be short on return, so we measure static pressure and airflow before quoting. The fix is usually a second return or a larger return drop, not new ductwork. With Xcel supplying both fuels, the gas furnace stays as backup for the coldest weather.
Can we replace only the AC in our Maplewood house and keep the furnace?
Yes, if the furnace is in good shape and has years left. The indoor coil sits on top of the furnace and should be replaced with the condenser, so the pair is matched and reaches its rated SEER2 efficiency; rebates often require an AHRI-rated match. If the furnace is past 20 years, replacing both at once saves a second install day and puts both pieces on the same warranty clock.
Also serving near Maplewood
- Oakdale, MN 2 mi
- Woodbury, MN 3 mi
- North St. Paul, MN 4 mi
- Saint Paul, MN 5 mi
- South St. Paul, MN 5 mi
- Lake Elmo, MN 5 mi
- Newport, MN 6 mi
- West St. Paul, MN 6 mi
Guides for Maplewood homeowners
Best Place for a Thermostat, and the Spots That Read Wrong
Where a thermostat belongs in a Minnesota house, the 7 spots that give false readings, a simple test for yours, and when moving it beats a smarter model.
Read the guideGeothermal Heat Pump Cost in Minnesota
What a geothermal heat pump costs in Minnesota, why the ground loop drives the price, what the state requires for drilled loops, and incentives left in 2026.
Read the guide- How to Clean a Furnace Flame Sensor SafelyMaintenance
- Spring AC Tune-Up Checklist for Minnesota HomesMaintenance
- How Many Tons of AC Does a Minneapolis House Need?Cooling
Brands we service in Maplewood: AirEase · Amana · American Standard · Ameristar · Aprilaire · Arcoaire · Armstrong Air · Bosch · Broan-NuTone · Bryant · Buderus · Burnham · Carrier · Champion · Coleman · Comfortmaker · Concord · Daikin · Day & Night · Ducane · ecobee · Frigidaire · Fujitsu · Gibson · Goodman · Google Nest · Gree · Heil · Honeywell Home · Lennox · LG · Lifebreath · Lochinvar · Luxaire · Maytag · Midea · Mitsubishi Electric · MrCool · Navien · NTI · Payne · Peerless · Rheem · Rinnai · RunTru · Ruud · Samsung · Santa Fe · Tempstar · Trane · Triangle Tube · Utica Boilers · Viessmann · Weil-McLain · Westinghouse · York
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Heat out in Maplewood? Call or send a request.