3 Reasons the AC is Blowing Warm Air

The main purpose of having an air conditioner is to cool off the house with cool air. If the air conditioner starts blowing warm air, then there is clearly something wrong. When this happens there are a few different causes the homeowners can check for themselves before calling Diamond Heating and Cooling.

  1. Thermostat Settings

A fairly obvious mishap is one that occurs when the thermostat is accidentally set to heat instead of cool. This can happen because of an accidental bump, or even children playing with the thermostat. Also check to make sure the fan is set to “auto” instead of “on” because it could be blowing air through the vents when the system isn’t cooling the air. It isn’t necessarily blowing warm air, but the air isn’t being cooled by the system.

  1. Clogged Outside Unit

Clear debris away from the outside AC unit frequently. If dirt and debris builds up around the AC unit, it could be restricting the airflow to the condenser coil preventing it from removing the heat from the home. Trim any bushes, weeds, or grass that could restrict airflow when doing yardwork.

  1. Loss of Power

Homeowners can check to see if the outdoor unit has power by looking at the circuit breaker or the emergency shutoff switch. Reset the breaker or the switch and see if that solves the problem. If the AC trips the breaker, it could also be the sign of an electrical problem with the air conditioner, which should be addressed as soon as possible.

If the above three issues aren’t what is causing the warm air flow, call Diamond Heating and Cooling. The problem could be low Freon, a refrigerant leak, a dirty evaporator coil, or broken return duct, all of which should be addressed by an HVAC professional.


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