An outside unit that hums while the fan stays still is the call we get most in July in Great Falls, MT, 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.
For winter breakdowns, see Furnace Repair.
Warning Signs for AC Repair
Catching these issues early helps you avoid costly problems. Here are the most common indicators that it's time to call a professional:
- Higher summer bills even though the house still feels warm and humid
- A condenser fan that sits still while the outdoor unit hums
- Frost or ice forming on the copper lines or the indoor coil
- Water dripping from the indoor unit or showing up on the ceiling below
- Hissing or bubbling sounds that suggest a refrigerant leak
- The system short-cycling every few minutes without cooling the house
- Vents blowing air that is barely cooler than the room
- A hot electrical smell or a tripped breaker whenever the air conditioner kicks on
Early Action Saves Money
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. Don't wait, call (406) 204-2768 and we'll take a look right away.
