Have you ever experienced the frustration of turning on your air conditioner on a hot summer day, only to find that it is blowing warm air instead of cool? There are several reasons why your AC may be blowing warm air, but the good news is that many of them can be easily fixed. This blog post will discuss some common causes of this issue and provide some tips for troubleshooting the problem.

Dirty Air Filter

One of the most common causes of an AC blowing warm air is a dirty air filter. When the filter becomes clogged with dust and debris, it restricts airflow and can cause the evaporator coil to freeze up. This can lead to the AC blowing warm air instead of cold air. To address this problem, try swapping out the air filter with a new one to see if that solves it.

Refrigerant Leak

Another common cause of warm air coming from your AC is a refrigerant leak. Refrigerant is what cools the air in your system, so if there is a leak, it can lead to a lack of cooling capacity. If you think there might be a refrigerant leak, you should reach out to a skilled HVAC technician to identify and fix the issue. 

Faulty Thermostat

Sometimes the issue isn't with the AC unit itself but with the thermostat. If the thermostat is not functioning properly, it may not be sending the correct signals to the AC system to cool the air. Check that the thermostat is in cool mode and see if the temperature is lower than the current room temperature. If the thermostat is not working correctly, you may need to replace it.

Dirty Evaporator Coil

The evaporator coil absorbs heat from the air in your home, which is then cooled and circulated back into your living space. If the coil becomes dirty or coated with dust and debris, it can hinder the heat transfer process and cause the AC to blow warm air. Cleaning the evaporator coil regularly can help prevent this issue from occurring.

Electrical Issues

In some cases, warm air coming from your AC could be due to electrical issues such as a malfunctioning compressor or faulty wiring. If you suspect an electrical problem, it's best to leave it to the professionals to diagnose and repair. Attempting to fix electrical issues yourself can be dangerous and may void your warranty.

If you notice any of the signs in this article or would like to learn more, contact a local company like Service 1 Plumbing, Heating & A/C Inc.