An outside unit that hums while the fan stays still is the classic summer service call in Hartford, CT, 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.
For winter breakdowns, see Furnace Repair.
Warning Signs for AC Repair
Recognizing the warning signs early can save you time and money. Keep an eye out for the following clues:
- An AC that turns on and off every few minutes but never cools down the house
- Vents blowing air that is barely cooler than the room
- Hissing or bubbling sounds that suggest a refrigerant leak
- A condenser fan that sits still while the outdoor unit hums
- Ice on the refrigerant lines or a frozen indoor coil
- Rising electric costs paired with a sticky, uncomfortable house
- Puddles near the air handler or water stains on the ceiling beneath it
- Breaker trips or a burning odor at startup
Don't Wait for a Total Failure
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. Call (860) 470-9941 at the first sign of trouble.
