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My Air Conditioning is Blowing Hot Air: What Should I Do?

Posted by Brittany on Jul 8, 2015 5:36:17 PM

Summer is full of preventable problems – sunburns, dehydrated kids, weeds, and humid homes – just to name a few. If you are a regular reader to this blog, you’ll know you’re at the right place when it comes to preventing the latter – AC issues. So what do you do if your air conditioning is blowing hot air? Follow these simple steps before you call a technician and you may save yourself some money.

Check The Thermostat

Yes, this may seem obvious, but it should be the first step before you call a technician to fix your AC. Did you accidently set it to ‘heat’ and not ‘cool?’ Perhaps someone else set it at a higher temperature in the house? Either way, it best to check first before making a service call for something that doesn’t need to cost you money.

Check For Airflow Restrictions

If you thermostat is set correctly, think about how long it’s been since you’ve replaced the filter or had a maintenance check done on your AC. If an old filter is restricting airflow, or you have a dirty coil, that may cause the AC compressor to freeze up. And, according to the U.S. Department of Energy, the compressor is the part of the AC that moves the refrigerant, which cools the air. 

Check to make sure everything is clean by following our guide on getting your AC ready for hot weather, or if you aren’t comfortable doing it yourself, call an HVAC pro to get your unit cleaned and checked out.

Check The Outdoor Unit

AirConditioningisBlowingHotAir-897165-editedIf you know you have a clean filter/coil and your thermostat is working fine, then check to make sure the outdoor unit is running.  Our resident pro, Keith Hill, technical support manager from Minnesota Air, says if it’s not running, it may be a blown fuse or tripped circuit breaker.

“Remember you probably have a fuse outside near the outdoor unit as well as in the main electrical panel,” he says. “If the unit comes on and works OK, great. But if it trips again, then call a service tech. Or if it is running outside and still no cool air, then it’s time to call a pro.”

Other AC Considerations

Keith says to remember that it is not uncommon for the air coming out of the registers to feel “cool,” even though the AC is not working. 

“You may think the unit is working, but it may just be the cooling effect of moving air,” he says. “Also, when the AC first starts when it’s extremely hot and humid indoors  – maybe you just came home from vacation and the unit has been off all week – the air coming out of the registers may not feel all that cool.”

Keith wants homeowners to know that it takes some time to bring the air temp down, so don’t be too concerned that it doesn’t feel as cool as it normally does. 

And, if you are experiencing other air conditioner problems (unit not running, too long to cool the house, too noisy, etc.), you can try these simple solutions. But always remember, getting help from a professional HVAC technician, like the folks at, will fix your AC troubles and is necessary to stop the little preventable problems from turning into bigger issues.

The Essential Guide to AC

Topics: Air quality, Cooling