Why Is the Fan on My Outdoor AC Unit Not Spinning?
Outdoor AC fan stopped while the unit hums? Usually a capacitor, fan motor or contactor. Why to shut it off now, safe checks, and typical repair costs.
Read the guideCooling Guides
Central air, sizing, noises, leaks and what to do when the AC quits in July.
Central air in Minnesota works hard for a short season. Humid July dew points, cottonwood fluff packed into the condenser coil and a system that sat idle all winter explain a lot of the calls we get in June. These guides cover why an air conditioner blows warm air, hums without starting, freezes up or leaks water, and what each fix involves.
If you're replacing a system, start with sizing and efficiency: how a Manual J load calculation sets the tonnage, what SEER2 means for a Minnesota house, and when a two-stage or variable-speed unit is worth the extra money. For service, see AC repair and AC replacement.
How Long Does a Central Air Conditioner Last in Minnesota?
Carrier and Lennox put central AC life at 15–20 years. See what Minnesota summers, cottonwood and salt do, and when a $5,200–$9,800 replacement beats repair.
Read the guideWhy Is My AC Freezing Up? Ice on Lines or Coil
Ice on your AC lines or indoor coil means weak airflow or low refrigerant. What to do right now, checks you can make, and when to call 612-429-3465.
Read the guideR-454B and R-32: What the Refrigerant Change Means
R-454B and R-32 are the lower-GWP refrigerants in new ACs and heat pumps. What EPA's rule says, how A2L ratings work, and the effect on your R-410A system.
Read the guideSEER2 vs SEER: What the New AC Rating Means
SEER2 replaced SEER on January 1, 2023 under a tougher DOE test, so numbers read lower. How it's measured, Minnesota's 13.4 minimum and what to buy.
Read the guideAC Leaking Water Inside the House: Causes and What to Do
Water by the furnace in July? Normal dripping versus a real leak, the usual causes (drain, pump, iced coil, cracked pan), and what to do right now.
Read the guideDoes the Furnace Need to Be On for AC to Work?
Yes. Central AC runs on the furnace's blower, filter and low-voltage power. What each part does in July, what to check at the furnace, and when to call.
Read the guideBest Central AC Brands for Minnesota (2026)
Central AC brands for Minnesota's short, humid summers: SEER2 payback, humidity control, coil matching, the R-454B and R-32 switch, and installed cost.
Read the guideCarrier Performance vs Comfort Air Conditioners Compared
Carrier Comfort vs Performance AC: which models are single-stage or two-stage, published SEER2 and sound ratings, warranty rules, and Minnesota fit.
Read the guideReplacing AC in River Falls, WI: RFMU, Permits and Sizing
Replacing central air in River Falls, WI: Manual J sizing, heat pump and ductless options, RFMU and Focus on Energy programs, and $5,200–$9,800 installed.
Read the guideHigh-Velocity AC for Older Minnesota Homes: Pros and Cons
High-velocity AC cools older Minneapolis and Saint Paul boiler houses through small tubing. HomeGuide puts it at $3,500–$15,000+. See when ductless wins.
Read the guideClogged AC Condensate Drain: How to Find It and Clear It
Water by the furnace in July usually means a clogged AC condensate drain. Learn how to clear it, whether the pump is to blame, and when to call 612-429-3465.
Read the guideR-22 AC in Minnesota: Repair, Recharge or Replace
Still running an R-22 AC in Minnesota? Repairs worth doing, reclaimed R-22 at $90–$150 a pound nationally, why retrofits rarely pay, and replacement.
Read the guideAC Humming Noise: What the Sound Means and What to Do
A humming AC condenser can be normal, or a failing capacitor, fan motor or contactor. How to tell by sound, safe checks, and typical repair costs.
Read the guideWhy Your AC Smells Like Dirty Socks, and How It Gets Fixed
A dirty-sock smell from the AC usually means growth on a wet indoor coil or a pan that won't empty. Why it hits Minnesota in spring and how it's fixed.
Read the guideAC Tonnage for Minneapolis Bungalows, Ramblers and More
AC tonnage for Minneapolis homes: a tons-to-BTU and airflow chart, why square-foot rules oversize, how to read your old unit's size, and what a Manual J does.
Read the guideSigns Your AC Evaporator Coil Is Leaking
Ice on the big copper line, long run times, a system that needs refrigerant every summer: how a coil leak shows up, how it's confirmed, and repair vs replace.
Read the guideRheem vs Goodman Air Conditioners: What Actually Differs
Rheem vs Goodman central AC for a Minnesota home: who owns each brand, R-454B vs R-32, matching tiers, warranty registration and the $5,200–$9,800 install.
Read the guide2-Stage vs Variable-Speed AC: Which Fits a Minnesota Home?
Two-stage or variable-speed AC for a Minnesota home? How each handles humid July days, SEER2 vs EER2, furnace needs, and $5,200–$9,800 installed pricing.
Read the guideAC Not Turning On? What to Check First in a Minneapolis Home
AC won't turn on? Check the thermostat, furnace switch, breakers, outdoor disconnect and drain float, plus Xcel cycling events, before you call a tech.
Read the guideAC Running but Not Cooling? What to Check, in Order
Your AC runs but the house won't cool. Checks a technician makes, in order: thermostat, filter, ice, outdoor unit, drain, and when it's a refrigerant leak.
Read the guideDuctless Mini-Split vs Central AC: Which Fits Your House?
Mini-split or central air? In Minnesota it turns on your ducts and heat source. Installed with us, AC runs $5,200–$9,800 and ductless $4,200–$12,500.
Read the guideHow to Size Central AC for a Twin Cities Home
Why square-foot rules oversize Minnesota air conditioners, what Manual J load calculation measures and how to read your current unit. Installs $5,200–$9,800.
Read the guideCooling questions
Why is my air conditioner running but not cooling?
The usual causes are a clogged filter, a frozen evaporator coil, a dirty outdoor coil, a failed capacitor or a refrigerant leak. Refrigerant work needs a technician with EPA Section 608 certification.
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