AC Blowing Warm Air? Try These 3 Solutions First

If 4th of July temperatures weren’t enough to make you realize how nice air conditioning is, the coming weeks will be sure to help remind you.

When outside air gets above 100 degrees, you want to be sure you can rely on your air conditioning unit.

But what happens when you want to cool down your home and the AC is blowing warm air?

Before calling the nearest repair shop, run our 3 Step HVAC System Check to make sure the problem can’t be easily fixed!

Step 1: Check Your Thermostat

  • Switch thermostat mode to “Cool”
  • Is the AC fan set to “Auto” or “On”?
  • Check thermostat batteries

I know that seems too simple, but you should always check the thermostat first. It could be as easy as setting the thermostat from “Heat” to “Cool.” If that’s the case, problem solved!

If not, check the fan setting on your thermostat. If your fan is set to “On” it could be blowing warm air without using the air conditioner.

Lastly, check your thermostat batteries. If batteries are low or dead, the thermostat may not be functioning correctly.

If your thermostat doesn’t seem to be the problem, move on to the next step.

Step 2: Check Your Breaker/Fuse Box

  • Locate HVAC Breaker or fuse
  • Ensure HVAC breaker or fuse has not been tripped or blown
  • If breaker has been tripped, place breaker fully into “Off” position, then flip back to “On”

Your air conditioner needs a lot of power to perform well. Sometimes this can cause a breaker or fuse to trip.

Locate your breaker box and find the breaker or fuse responsible for powering the air conditioner. Once you find the breaker, ensure it has not been flipped. If it has, flip the breaker all the way off then back on.

If this problem persists, or you can’t locate the correct breaker, it may be time to check for a possible AC repair.

Step 3: Check Filter

  • Unplug AC Unit
  • Check filter and change if necessary
  • If coils are frozen, power unit down and call a Maki professional

After you’ve looked at the thermostat and breaker box, one last thing you can try is checking the filter. If a filter gets too dirty, the evaporator coils could be coated with debris, restricting air flow.

Change out your filter to see if this solves the issue.

If your coils are covered in debris, contact a Maki HVAC specialist to have your air conditioner inspected.

If you try these fixes before calling a certified Maki HVAC technician, be sure to use caution. HVAC units are complex machines that require extensive training to properly service.

If you would like some help getting your air conditioner blowing cool air again, talk to one of Maki’s friendly staff members to set up your appointment.


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