Four Possible Reasons Your Air Conditioner Is Blowing Warm Air

Feeling hot

Posting Date: June 15, 2018
Posted by: Al Hill, Las Vegas, NV Branch Manager

It always seems to happen on the hottest days: you crank the A/C, ready to settle in for a little cold comfort in your Nevada home, when you reach down to the vent and notice that it’s blowing warm air.

What to do?

Well, that depends on why your air conditioner is blowing warm air. Here are four of the most common reasons:

  • Reason 1: The thermostat is set incorrectly – Make sure your thermostat is on its “cool” or “auto” setting; if It is set to “on,” your fan will blow air even when the A/C isn’t actually cooling, resulting in warm air coming through the vents. Operating in the “heat” setting will cause the same problem.
  • Reason 2: Airflow restriction – An airflow restriction somewhere in your cooling system can result in not enough air reaching through the vents to cool your home. Restricted airflow is commonly a result of one or both of the following:
  • Reason 3: The compressor lost power – The job of the indoor portion of your home cooling system (the evaporator coil and blower) is to distribute cool air throughout your home – but it will only have cool air to blow if the outdoor compressor is up and running.

    One possible reason for your compressor to stop working is a blown fuse or tripped circuit breaker; check yours to make sure the compressor is still receiving power (Note: If your air conditioner tripped your circuit breaker or blew a fuse, it could be a sign of a larger problem in your cooling system – contact us for service).

  • Reason 4: Compressor problems / low refrigerant – The most common cause of warm air blowing through your vents is either a problem with the compressor or low refrigerant (read more about refrigerant leaks here). You may also have a broken or disconnected return duct that is pulling in unconditioned air from outside or an attic space.

    In all these cases, you will need help from a professional technician.

Not getting peak performance from your home cooling system? Time to call the pros at Broward. Contact us today for expert HVAC tune-ups, HVAC repairs and HVAC maintenance in any of our service areas.

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