A humming outdoor unit with a fan that will not turn is the call we get most in July in Pocatello, ID, 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
Spotting the early warning signs lets you act before the problem gets expensive. Watch for these telltale signs:
- Puddles near the air handler or water stains on the ceiling beneath it
- An iced-over evaporator coil or frozen refrigerant lines
- Rapid on-off cycling that never brings the temperature down
- Vents blowing air that is barely cooler than the room
- Hissing or bubbling sounds that suggest a refrigerant leak
- Cooling bills climbing while the house stays sticky and warm
- The outdoor unit humming or clicking but the fan not spinning
- A hot electrical smell or a tripped breaker whenever the air conditioner kicks on
Act Before It Gets Worse
Left unchecked, even a small fault or temperature swing often signals a system working its way toward a breakdown. Call (208) 208-1923 at the first sign of trouble.
