A humming outdoor unit with a fan that will not turn is the classic summer service call in Peabody, MA, 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.
Warning Signs for AC Repair
Recognizing the warning signs early can save you time and money. Here are the most common indicators that it's time to call a professional:
- Hissing or bubbling sounds that suggest a refrigerant leak
- Higher summer bills even though the house still feels warm and humid
- Clicking or humming outside with no fan movement
- Puddles near the air handler or water stains on the ceiling beneath it
- An AC that turns on and off every few minutes but never cools down the house
- Room-temperature air from the registers even though the AC is running
- Frost or ice forming on the copper lines or the indoor coil
- Breaker trips or a burning odor at startup
Don't Wait for a Total Failure
A failing capacitor, clogged condensate drain, or dirty flame sensor rarely fixes itself and usually gets more expensive to address the longer it runs. At the first hint of a problem, call (351) 345-9326 for a fast inspection.
