Why Is My AC Blowing Warm Air

There are several reasons why your air conditioner is blowing warm air. It can be an incorrect thermostat setting, an airflow restriction, or an issue with your compressor. Low refrigerant and dirty evaporator coils are also common reasons your AC may be running but not cooling.

Given that there are so many possible reasons your AC is malfunctioning, you’ll want to work with a professional HVAC technician, like us at Vanport Mechanical. Our certified technicians can install, maintain, and repair all types of air conditioners, including mini-split air conditioners and central air conditioners. We’ll take out the guesswork, fix your air conditioner, saving you both time and money. So give us a call today for a free quote.

Reasons Your AC is Blowing Warm Air

Want help troubleshooting your air conditioner problem before contacting us? We’ll describe the most common causes that you may be able to diagnose yourself.

Thermostat Setting

We understand this may sound obvious, but one of the first things you’ll want to check is your thermostat setting. Make sure it’s set to, “auto”. The “on” setting is just a fan and the “heat” setting is for your heater. You’ll also want to make sure that the temperature it’s set to be lower than the temperature in your space so that it “kicks on”.

Your Outside Unit Has No Power

Your air conditioning system is comprised of two main components: the indoor unit (evaporator/blower unit) and the outdoor unit (A/C condenser). Your indoor unit could blow warm air if your outdoor unit has lost power. Check your breaker box or fuse box to see if a breaker has tripped or if there’s a blown fuse.

Airflow Restriction

Your air conditioning units work together to remove heat from your home and exchange it with cool air. If there’s a lot of debris clogging your outdoor unit, your system cannot remove heat efficiently. As a result, you may experience warm air. This is why it’s important to keep the area near your outdoor AC unit clean.

Dirty Air Filter

Another common reason for air conditioning problems is a dirty air filter. A dirty air filter will cut off airflow to the indoor unit and over time the evaporator cooler will freeze. You can identify this by seeing ice or frost on the copper pipes.

Loe Refrigerant Levels

Refrigerant is responsible for absorbing warm air. If you have a refrigerant leak, your AC may blow warm air into your home as it struggles to absorb it. You’ll know this is the reason if your indoor and outdoor air conditioning units have ice formations. Only a qualified and licensed HVAC technician should measure your refrigerant levels and add refrigerant when necessary.

HVAC Experts

The best way to help prevent your air conditioner from blowing warm is to have your system serviced at least twice a year. Regular maintenance will extend the life of your HVAC system and it will address issues before they become costly problems later.

If your air conditioner is experiencing cooling problems, give us a call today. We’re available 24/7 for all of your HVAC needs!