An outside unit that hums while the fan stays still is the call we get most in July in Eau Claire, WI, 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
Catching these issues early helps you avoid costly problems. These are the signals our technicians see most often:
- Warm or room-temperature air blowing when the thermostat calls for cooling
- Puddles near the air handler or water stains on the ceiling beneath it
- Ice on the refrigerant lines or a frozen indoor coil
- Clicking or humming outside with no fan movement
- A hot electrical smell or a tripped breaker whenever the air conditioner kicks on
- Bubbling or hissing noises that point to a possible refrigerant leak
- Rapid on-off cycling that never brings the temperature down
- Higher summer bills even though the house still feels warm and humid
Early Action Saves Money
Left unchecked, even a small fault or temperature swing often signals a system working its way toward a breakdown. Don't wait, call (534) 231-2225 and we'll take a look right away.
