Why Is My AC Blowing Warm Air?

One of the most common air conditioning problems people experience in St. Louis, MO is having warm air blow through the vents when they should be getting fresh, cool air flowing through instead. There’s a large number of possible reasons why an air conditioner could be blowing warm air, but today we’ll focus on just a few of the most common.

Thermostat settings

Any time you’re having temperature issues with the air coming from your vents, your first step should be to check the settings on your thermostat. While it might sound ridiculous, there is a possibility that you have the air set to “heat” instead of “cool.” Other settings, such as “auto” or “on,” may simply result in the fan blowing regardless of whether the air conditioner itself is running and cooling the air. This would cause your AC to blow warm air through the vents during the periods of time when the outside unit isn’t operating.

So, simply put, check your settings on your thermostat and make sure you’ve actually set it up to get cool air coming into your home!

Problems with the outdoor unit

There are a couple main components for every air conditioning system, split between the indoors and the outdoors. The indoor unit will feature the fan that blows the air through your home, but it will only operate if the outdoor components are also working properly.

The outdoor unit features the compressor, which compresses the refrigerant that flows through the system. In most cases, if you’re having a problem with the air conditioner blowing warm air, it’s going to mean there’s either a problem with the compressor or that your system is low on refrigerant.

Problems with indoor systems

While most of the time equipment problems will primarily be found in the outdoor unit, there are some issues that can occur with interior components. It is possible that you have a broken or disconnected air return duct that is pulling in air from the outside or the attic without conditioning it. You might have a circuit breaker that was tripped or a fuse that was blown, which has resulted in power to the AC unit being shut off, so check your circuit breaker or fuse panel and make sure it’s actually getting the electricity it needs to maintain power.

Airflow restrictions

Another potential problem could be that there’s something restricting the amount of air that’s going to or from your air conditioner. Restricted airflow can result in the compressor freezing up. Causes of restricted airflow can include a clogged air filter that needs to be replaced, or dirty coils caused by a general lack of maintenance to your air conditioning system. You should make it a point to have your system inspected and maintained each year by an air conditioning technician so it operates as efficiently as possible and you can extend its usable life.

When you need more information about common air conditioning problems and how you can resolve them, an air conditioner maintenance service in St. Louis, MO can help. Contact Ashley Brothers Heating & Cooling today!