Common AC Problems and How to Fix Them
Try these steps before calling a technician. Save $150-$300.
AC Blowing Warm Air?
- Check thermostat — cool mode
- Check filter — clogged?
- Check outdoor unit — debris?
- Check for ice — fan only 2-3 hrs
- Still warm? Low refrigerant — call pro
AC Leaking Water?
- Window: Check tilt angle
- Central/Mini-Split: Drain clogged
- Frozen coil melting: Fix root cause
Loud Noise?
- Rattling: Loose parts
- Buzzing: Electrical — call pro
- Grinding: Motor bearings — repair
- Hissing: Refrigerant leak — off now
- Clicking: Compressor relay
Bad Smell?
- Musty: Mold on coil/drain
- Burning: Electrical — turn off
- Chemical: Refrigerant leak
Short Cycling?
- Oversized unit
- Dirty filter
- Thermostat in sunlight
- Low refrigerant
- Faulty capacitor