An outside unit that hums while the fan stays still is the call we get most in July in Davis, 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.
When to Call for AC Repair in Davis
Catching these issues early helps you avoid costly problems. Here are the most common indicators that it's time to call a professional:
- Room-temperature air from the registers even though the AC is running
- Breaker trips or a burning odor at startup
- Frost or ice forming on the copper lines or the indoor coil
- Puddles near the air handler or water stains on the ceiling beneath it
- A hiss or gurgle from the lines, a common sign of leaking refrigerant
- Rising electric costs paired with a sticky, uncomfortable house
- A condenser fan that sits still while the outdoor unit hums
- The system short-cycling every few minutes without cooling the house
Act Before It Gets Worse
Left unchecked, even a small fault or temperature swing often signals a system working its way toward a breakdown. Don't wait, call (530) 201-3647 and we'll take a look right away.
