Repair or Replace: Air Conditioner is Blowing Hot Air

When an air conditioner is blowing hot air instead of cool air, it’s not necessarily a sign of a major system failure. In many cases you can repair it yourself, or you may have to call in a professional. Here are a few things to check when your air conditioner is blowing hot air.

Thermostat Settings

Verify that your thermostat is set to cool your home and that the fan is set to “Auto.” When the fan is set to “On,” warmer air may be circulated between cooling cycles.


Be sure that the breakers for the system are on — turn them off and then back on if you’re unsure. A tripped breaker can shut down the compressor while still allowing the fan to circulate warm air.

Air Filter

Make sure the air filter is not dirty or clogged. A dirty air filter can reduce airflow, causing the system to shut down and blow warm air.

Outdoor Coil

Make sure that the outdoor condenser coil is not covered or blocked by furniture or other items, and that the coils themselves are not clogged with leaves, grass or small debris. Turn off the power and clean the coils if necessary. A clogged condenser can prevent heat from being properly released.

Indoor Coil

A clogged evaporator coil can cause airflow problems, leading to a frozen coil and the distribution of warm air. If the evaporator coil is accessible, it can be cleaned with a soft brush and a vacuum.

Refrigerant Level

Low refrigerant can also lead to cooling problems. Have a professional check for leaks and proper refrigerant levels.

If these steps have not solved the problem, it may be more serious, such as a major refrigerant leak or a damaged compressor. Have a professional inspect the system and determine the cause. If extensive repairs are required or the air conditioner is over 10 years old, it may be time to replace it.

If your air conditioner is blowing hot air, contact our team at Conditioned Air for assistance. We have been serving the Southwest Florida area since 1962.

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