Why Is My AC Unit Blowing Warm Air?

There is nothing worse than coming home on a hot summer day to an air conditioner that is blowing out warm air. While there are several reasons why your AC unit may be blowing out warm air, here are a few of the most common reasons, some of which are easy DIY repairs.

Dirty Air Filter

It is extremely important to routinely change the air filter, especially at the beginning of spring and spring. If the air filter is clogged with dust, dirt and debris it can clog the air conditioner’s condensing coil with dust, dirt and contaminants that will cause the AC unit to freeze up and not cool your home properly. It is best to change the air filter once a month year round to avoid the risk of buildup of dust and dirt.

Check the Thermostat

Check the thermostat, yes, as silly as it sounds, it actually happens a lot, especially during the time of the year when you don’t have the heat or the air conditioner on. Make sure the setting isn’t still on heat and that the fan isn’t set to on. When the fan is set to “on”, it is continuously blowing air through the vents, even when the system isn’t working to cool the blown air, so the air being blown is warm. Check the thermostat to make sure the settings are on “cool” and “auto”.

The Outside Unit is Clogged

There are two components that make up your homes AC system, an inside unit and an outside unit. Both of these units work together to remove the heat from your home, but in order for this to work, there needs to be unrestricted airflow coming from the condenser coil (located in the outside unit). If the condenser coil is dirty or covered with debris, it can keep your AC from properly cooling the air inside your home. To mend this problem, simply use a broom to sweep away any visible debris on and around the outside unit. You can also clean the inside of the unit by first turning off the power, remove the top of the unit and use a shop vac or your hands to remove any leaves and other debris that may be inside of the AC unit. Use a hose on the lowest pressure to spray debris off of the blades.

If these DIY repairs don’t work and the AC unit continues to blow out warm air, it may be something such as the unit is low on refrigerant or a duct may be disconnected or broken. If it is either one of these problems, you should contact a local HVAC company as soon as possible to inspect the unit and make any repairs necessary.

If you need an AC unit or heater repairs or a plumbing expert, contact the team at Pritchard Wilson today.


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