You should turn off your AC if it is blowing warm air after confirming the thermostat is set to Cool and the air filter isn’t clogged. The most common cause is restricted airflow or low refrigerant, which can overheat the compressor or freeze the coil and lead to bigger repairs.
Our technicians routinely see that letting the system rest prevents a simple fault from turning into a failed compressor, and we service homes throughout the Plainfield area.
Do these quick checks, then decide:
- Verify thermostat is set to Cool and the fan is on Auto.
- Check and replace a dirty air filter.
- Look for ice on the refrigerant lines or outdoor coil and any tripped breaker.
- If you smell burning or hear grinding, shut off power and call for service immediately.
If it still blows warm after these steps, keep the unit off and schedule a professional diagnostic; we offer 24/7 emergency AC repair when needed.
Updated: 2026-09-26
Need help in Plainfield, IL? Call (331) 294-8731 or book online.
"Need a line repaired on our AC. Called Summers, technician came out same day, found leak in record time, have a appointment for next day to repair - very reasonable." — Marce B.