An outside unit that hums while the fan stays still is the classic summer service call in Bethlehem, 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.
When the heat goes out, see Furnace Repair.
Warning Signs for AC Repair
The sooner you notice these red flags, the easier and cheaper the fix. Keep an eye out for the following clues:
- An iced-over evaporator coil or frozen refrigerant lines
- Rising electric costs paired with a sticky, uncomfortable house
- Water dripping from the indoor unit or showing up on the ceiling below
- Hissing or bubbling sounds that suggest a refrigerant leak
- Warm or room-temperature air blowing when the thermostat calls for cooling
- A burning smell or repeated breaker trips when the AC starts
- Clicking or humming outside with no fan movement
- The system short-cycling every few minutes without cooling the house
Early Action Saves Money
Left unchecked, even a small fault or temperature swing often signals a system working its way toward a breakdown. Call (610) 788-0052 at the first sign of trouble.
