A humming outdoor unit with a fan that will not turn is the classic summer service call in York, PA, 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
Spotting the early warning signs lets you act before the problem gets expensive. These are the signals our technicians see most often:
- A burning smell or repeated breaker trips when the AC starts
- Puddles near the air handler or water stains on the ceiling beneath it
- The system short-cycling every few minutes without cooling the house
- Bubbling or hissing noises that point to a possible refrigerant leak
- Cooling bills climbing while the house stays sticky and warm
- Frost or ice forming on the copper lines or the indoor coil
- Warm or room-temperature air blowing when the thermostat calls for cooling
- Clicking or humming outside with no fan movement
Don't Wait for a Total Failure
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. At the first hint of a problem, call (717) 200-9258 for a fast inspection.
