What should I Check before Calling for Emergency Ac Repair when the Air Feels Warm?

Before calling for emergency service when your air conditioner is blowing warm air, you should perform several simple troubleshooting checks. These steps can often resolve the issue without the need for a professional service call.

1. Verify Thermostat Settings

Check that your thermostat is set to COOL and the desired temperature is lower than the current room temperature. Ensure the fan is set to AUTO rather than ON, as the “ON” setting runs the fan continuously even when the system isn’t cooling, which can push warm air through your vents.

2. Inspect the Air Filter

A clogged filter restricts airflow and can cause the evaporator coil to freeze, resulting in warm air. If the filter is dirty, replace it and turn the system off for a few hours to allow any internal ice to thaw before restarting.

3. Clear the Outdoor Unit

Check the outdoor condenser unit for debris like leaves, grass clippings, or cottonwood fuzz. Ensure there is at least two feet of clear space around the unit and gently rinse the fins with a garden hose to remove dirt buildup.

4. Check Power Sources

Verify that the circuit breaker labeled AC or Condenser has not tripped. Also, ensure the outdoor disconnect switch near the unit is in the ON position.

If these checks do not restore cool air, or if you notice hissing sounds, buzzing, or if the unit re-freezes after a filter change, it is time to contact a professional for repair.

• AC Blowing Warm Air: Troubleshooting Guide for Homeowners