Temperatures are steadily rising, so now is not a convenient time to have an air conditioner outage. It’s even worse when the AC unit blows hot air instead of cold. This issue can leave your home feeling too warm and uncomfortable, but knowing the causes behind it can help you stay cool this summer season.

What Causes Hot Air to Blow Out of an AC Unit?

Sometimes, the reason behind an air conditioner blowing hot air is as simple as a thermostat that’s accidentally set to heat mode. However, if your thermostat is set correctly, you may have a deeper problem, such as a dirty evaporator coil.

Debris from clogged, unchanged air filters can collect on the evaporator coil, which absorbs heat from your home with the help of refrigerant. If the coil is dirty, the heat exchange doesn’t occur, and the system blows hot air instead of cold.

Another reason your AC unit might stop cooling your house is an improperly maintained outdoor component. This portion of the system is exposed continuously to the elements, and the condenser coils inside can get dirty.

When refrigerant that has absorbed heat from inside the house travels to the outside coils, a fan helps remove the warmth. Like the evaporator coils, the condenser coils have reduced efficiency if they are too dirty or if the airflow is blocked.

How Can You Fix This Issue?

Change the air filter at least once every three months—every month if you have pets—to keep the system’s inner components from becoming clogged with debris. In addition, schedule regular professional maintenance from an HVAC contractor.

These technicians can identify small problems before they become significant issues that could leave you without a cooling system when you need it the most. Not only can they inspect and repair the unit to ensure optimal performance, but they can also clean the inside of the unit to prevent dirt buildup and clogs.

This summer, keep your AC unit blowing cold, refreshing air all season long with help from the professionals at Donovan & Jorgenson. Serving Greater Milwaukee, WI, for over 30 years, this leading heating and cooling company offers excellent HVAC services, including routine maintenance and 24/7 emergency repairs. Experience their personalized service by contacting them online for an estimate.