A humming outdoor unit with a fan that will not turn is the classic summer service call in Overland Park, KS, 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
Recognizing the warning signs early can save you time and money. Keep an eye out for the following clues:
- Clicking or humming outside with no fan movement
- Vents blowing air that is barely cooler than the room
- Breaker trips or a burning odor at startup
- Frost or ice forming on the copper lines or the indoor coil
- Rising electric costs paired with a sticky, uncomfortable house
- A hiss or gurgle from the lines, a common sign of leaking refrigerant
- The system short-cycling every few minutes without cooling the house
- Water dripping from the indoor unit or showing up on the ceiling below
Act Before It Gets Worse
Left unchecked, even a small fault or temperature swing often signals a system working its way toward a breakdown. If you notice any of these signs, call (913) 452-5463 for a prompt inspection.
