An AC blowing out hot air makes Dayton’s muggy summers even harder to bear, but this problem often has a simple solution.
Oversights and Debris
Start by making sure your system is set to “Cool” and that the temperature is lower than your indoor temperature. Even if you know you set it correctly, it might have been bumped out of place. Also, make sure that the outdoor unit’s circuit breaker and emergency shut-off switch haven’t been tripped.
Next, check the air filter. A dirty air filter slows airflow and prevents sufficient cool air from reaching your rooms. Standard 1-inch filters usually need replacement at least once every 90 days. If you can hold the filter up and not see light through it, put in a clean filter.
A dirty or blocked outdoor condenser can also cause a situation where your AC is blowing out hot air. If you think this might be your problem, unplug your AC and trim back vegetation at least 2 feet from the unit. Then remove the top. Use a wet-vac to remove debris, apply a foaming cleaner, then gently rinse the cleaner off with a garden hose. Straightening bent fins helps too.
A dirty indoor evaporator coil causes similar problems. This component draws heat out of warm air passing over it. If it’s caked in dust, it won’t be as effective. Foaming cleaners are available to remove buildup, but if yours looks rusty or otherwise damaged, contact a professional.
A less common cause of an AC blowing out hot air is a damaged refrigerant line or compressor that’s allowing refrigerant to escape. Refrigerant is what helps your system remove heat from the air, so when you don’t have enough, your air won’t be cool, and you’ll find your AC blowing out hot air. You might also notice ice on your evaporator coil. This issue requires professional care as soon as possible, because refrigerant is toxic, and running the AC with low refrigerant can damage the compressor.
If you need help with an AC blowing out hot air, contact us at Detmer and Sons from anywhere in the Dayton area.