An outside unit that hums while the fan stays still is the call we get most in July in Binghamton, NY, 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
Catching these issues early helps you avoid costly problems. Watch for these telltale signs:
- Frost or ice forming on the copper lines or the indoor coil
- Cooling bills climbing while the house stays sticky and warm
- The system short-cycling every few minutes without cooling the house
- Hissing or bubbling sounds that suggest a refrigerant leak
- Warm or room-temperature air blowing when the thermostat calls for cooling
- A hot electrical smell or a tripped breaker whenever the air conditioner kicks on
- Water leaking around the indoor unit or from the ceiling below it
- A condenser fan that sits still while the outdoor unit hums
Early Action Saves Money
A failing capacitor, clogged condensate drain, or dirty flame sensor rarely fixes itself and usually gets more expensive to address the longer it runs. Don't wait, call (607) 200-5171 and we'll take a look right away.
