An outside unit that hums while the fan stays still is the call we get most in July in Dunwoody, GA, 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.
When to Call for AC Repair in Dunwoody
Recognizing the warning signs early can save you time and money. These are the signals our technicians see most often:
- Breaker trips or a burning odor at startup
- Rapid on-off cycling that never brings the temperature down
- Water leaking around the indoor unit or from the ceiling below it
- An iced-over evaporator coil or frozen refrigerant lines
- A condenser fan that sits still while the outdoor unit hums
- Bubbling or hissing noises that point to a possible refrigerant leak
- Room-temperature air from the registers even though the AC is running
- Cooling bills climbing while the house stays sticky and warm
Don't Wait for a Total Failure
Most HVAC failures start small, a weak capacitor, a squealing blower, a system that runs a little longer each week. If you notice any of these signs, call (470) 200-3365 for a prompt inspection.
