Three Reasons Why An Air Conditioner Unit May Begin Blowing Warm Air

4 July 2016
 Categories: , Blog


A central air conditioning unit may begin to malfunction by blowing warm air into a home's interior. This creates a huge problem for homeowners who are trying to keep their home's interior cool during the hottest parts of the year. 

Several different issues can cause warm air to be blown out of the unit rather than cool air. The following are the three most common reasons why this malfunction develops:

There is an electrical issue in the air conditioner's fuse or circuit.

An electrical issue can result in warm air being blown into the home if the outdoor unit of the AC system is not being supplied with power. If the fuse or circuit that supplies this part of the system with electricity is not working, warm air will be pulled into the home from the outside without being cooled in the outside components of the AC unit.

If an electrical issue causes an AC system to blow warm air into the home, the problem can usually be fixed by replacing the faulty fuse or circuit with new equipment.

A clog is blocking the flow of air through the unit.

A clog occurring in an AC unit's air filter can block air flow and prevent warm air from being blown out of the system. If this happens, the warm air could end up being blown into the home. While the filter is the part of the system where a clog is most common, a clog could also occur in a home's ductwork. 

A clog in the unit's filter can be fixed by simply replacing or cleaning out the filter. A clog in the home's ductwork could require more invasive repair procedures. However, it's important to repair restricted airflow as quickly as possible, because airflow issues could compromise the interior air quality of the home in addition to reducing the efficiency of the AC unit. 

There is not enough refrigerant in the unit.

The refrigerant in an AC system is responsible for cooling hot air before it is blown into the home's interior. If a refrigerant leak occurs, the system will not be able to cool the air and will simply blow hot air from the outside of the home to the inside. 

Refrigerant leaks can result from worn out service valves. They can develop over time due to normal wear and tear on HVAC equipment. They can also occur if anything outside collides with the outside unit and causes impact damage. 

Repairing a refrigerant leak could require valve replacement or replacement of another mechanical component of the outdoor unit of a central air conditioning system. For more information, contact a service like Absolute Air Conditioning & Heating.