A humming outdoor unit with a fan that will not turn is the call we get most in July in El Monte, CA, and the cause is usually a failed run capacitor. That inexpensive component starts the compressor and fan, fades for years without complaint, and then quits under peak load. It is far from the only suspect, though. Contactors pit and stop passing clean power, condenser fan bearings dry out, small refrigerant leaks drain away cooling capacity, and evaporator coils ice over when a clogged filter strangles airflow.
Heating trouble instead? See Furnace Repair.
Warning Signs for AC Repair
Catching these issues early helps you avoid costly problems. Keep an eye out for the following clues:
- A hot electrical smell or a tripped breaker whenever the air conditioner kicks on
- Rising electric costs paired with a sticky, uncomfortable house
- Clicking or humming outside with no fan movement
- Vents blowing air that is barely cooler than the room
- The system short-cycling every few minutes without cooling the house
- Hissing or bubbling sounds that suggest a refrigerant leak
- Water leaking around the indoor unit or from the ceiling below it
- Frost or ice forming on the copper lines or the indoor coil
Early Action Saves Money
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. Call (626) 231-7796 at the first sign of trouble.
