AC blowing warm air? 5 things to check before you call
Warm air from the vents is one of the most common calls we get in the Valley. Sometimes it's a quick fix you can handle yourself. Here's what to check first.
1. The thermostat
Make sure it's set to Cool, not Heat or Fan only, and that the set temperature is below the room temperature. If it runs on batteries, try fresh ones. A dead thermostat can look like a dead AC.
2. The air filter
A clogged filter chokes airflow, and your system can't cool what it can't move. If the filter looks gray or dusty, replace it.
3. The breaker
Your AC usually has two breakers, one for the indoor unit and one for the outdoor unit. If one has tripped, reset it once. If it trips again, stop and call. That's a sign of an electrical problem.
4. The outdoor unit
Go outside while the AC is on. Is the fan spinning? Is the unit humming? Clear away any leaves, trash, or overgrown plants so it has room to breathe.
5. Ice on the lines
Ice on the copper line or the indoor coil means something is wrong, often low airflow or low refrigerant. Turn the AC off, switch the fan to On to help it thaw, and give us a call.
Still not cooling? Our $99 diagnostic finds the real cause, and it's credited toward completed repairs over $500.