What to Do If AC Stops Working

July 1, 2025

AC Repair

What to Do If AC Stops Working

There’s nothing worse than your AC suddenly stopping on a scorching day. Don’t panic—there are a few steps you can take before calling a professional.

Check the Thermostat and Power

First, ensure your thermostat is set to “cool” and the temperature is lower than the current room temperature. Sometimes, dead batteries in the thermostat can cause your AC to stop. Replace the batteries if needed, and check your circuit breaker to ensure the AC unit hasn’t tripped the breaker.

Inspect the Air Filter

A clogged air filter can block airflow and cause your AC to shut down or blow warm air. Remove the filter, and if it’s dirty, clean it or replace it with a new one to help your system breathe again.

Examine the Outdoor Unit

Check your outdoor AC unit to ensure it’s not blocked by debris, leaves, or dirt, which can restrict airflow and cause the system to shut off. Carefully clean around the unit and clear any obstructions.

Check for Ice Build-Up

If you see ice on the refrigerant lines or evaporator coils, turn off the system and let it thaw completely before restarting. Ice build-up can indicate airflow issues or low refrigerant levels, which may require professional service.

Call a Professional If Needed

If your AC still doesn’t work after these checks, it’s time to call a licensed HVAC technician. They can diagnose complex issues such as compressor problems, refrigerant leaks, or electrical failures to get your system back up and running efficiently.