An outside unit that hums while the fan stays still is the call we get most in July in Elkhart, IN, 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:
- Frost or ice forming on the copper lines or the indoor coil
- Rising electric costs paired with a sticky, uncomfortable house
- Hissing or bubbling sounds that suggest a refrigerant leak
- A condenser fan that sits still while the outdoor unit hums
- Water leaking around the indoor unit or from the ceiling below it
- Vents blowing air that is barely cooler than the room
- Rapid on-off cycling that never brings the temperature down
- Breaker trips or a burning odor at startup
Early Action Saves Money
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. If you notice any of these signs, call (574) 200-1362 for a prompt inspection.
