A humming outdoor unit with a fan that will not turn is the call we get most in July in Berkeley, CA, 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:
- A hiss or gurgle from the lines, a common sign of leaking refrigerant
- Higher summer bills even though the house still feels warm and humid
- Ice on the refrigerant lines or a frozen indoor coil
- A condenser fan that sits still while the outdoor unit hums
- A hot electrical smell or a tripped breaker whenever the air conditioner kicks on
- Warm or room-temperature air blowing when the thermostat calls for cooling
- Water dripping from the indoor unit or showing up on the ceiling below
- Rapid on-off cycling that never brings the temperature down
Don't Wait for a Total Failure
Left unchecked, even a small fault or temperature swing often signals a system working its way toward a breakdown. Don't wait, call (510) 201-4758 and we'll take a look right away.
