A humming outdoor unit with a fan that will not turn is the call we get most in July in Berwyn, IL, 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.
Heating trouble instead? See Furnace Repair.
Signs You Need AC Repair in Berwyn
Catching these issues early helps you avoid costly problems. Watch for these telltale signs:
- Bubbling or hissing noises that point to a possible refrigerant leak
- A condenser fan that sits still while the outdoor unit hums
- Vents blowing air that is barely cooler than the room
- Frost or ice forming on the copper lines or the indoor coil
- Cooling bills climbing while the house stays sticky and warm
- A burning smell or repeated breaker trips when the AC starts
- An AC that turns on and off every few minutes but never cools down the house
- Water dripping from the indoor unit or showing up on the ceiling below
Early Action Saves Money
Most HVAC failures start small, a weak capacitor, a squealing blower, a system that runs a little longer each week. At the first hint of a problem, call (708) 536-4738 for a fast inspection.
