Why Is My Air Conditioner Blowing Hot Air?

In this article, we will look into the possible reasons why your AC is blowing hot air.

Your thermostat is set incorrectly

Your AC may be blowing hot air because your thermostat is set to "HEAT" or "ON". When your AC unit is set on the "HEAT" mode, it will blow warm air into your room until the set temperature is reached. The "ON" mode means the unit will blow warm air continuously, no matter the external conditions. Before you call in an HVAC specialist for AC repair, check your thermostat to ensure it is set correctly. You could have flipped the switch accidentally or your little ones could have played around with the switch. Make sure your thermostat is set to "COOL" and "ON" mode to resolve the issue.

The filters are dirty or need replacing

AC filters remove particulates and contaminants from the air flowing through the unit. Over time, the filters may get dirty or clogged with dust and debris and block air from entering the unit. The filters can also wear out with time. When the unit’s cooling operation is impeded, the coils won’t be able to remove heat from your AC. So your air conditioner’s fan just blows hot air back into your space. This is why inspecting your AC’s filters regularly is such an important aspect of HVAC maintenance.

The condenser coils are dirty or blocked

Your AC’s condenser coils are frequently exposed to the elements since they’re located in the outdoor unit. Over time, they may accumulate dirt and grime, thereby impeding heat transfer. When this happens, your AC will begin to blow hot air instead of releasing heat into the outdoor air.

HVAC repair companies recommend you clean your condenser coils at least once a year and keep the outdoor unit clean. Additionally, you should maintain at least one foot of clearance around the outdoor condenser unit to maximize the system’s airflow.

The compressor has malfunctioned

A faulty AC compressor impedes the transfer of refrigerant between the evaporator and condenser coils, and this may cause your AC to blow hot air. A major sign that your AC compressor is damaged is the outside unit making strange noises. A faulty compressor should be fixed by a competent HVAC company to restore your air conditioner’s ability to cool properly.

You are low on refrigerant

Refrigerant is responsible for making the cooling happen by absorbing heat from your home’s air. If your unit’s refrigerant levels are low, your AC will continue to run and blow hot air, trying to reach the temperature you set on your thermostat.

Power issues

A blown fuse or tripped amp breaker can lead to hot air blowing from your air conditioner.

Your AC can blow hot air due to a clogged expansion valve, blocked return vents, or a clogged outside unit.

Looking for a reliable HVAC company to help you with AC repair? Look no further than Absolute HVAC Service. Our specialists have the expertise, experience and the right tools to repair and maintain different types of air conditioners.