An outside unit that hums while the fan stays still is the call we get most in July in Frisco, TX, 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.
When the heat goes out, see Furnace Repair.
Signs You Need AC Repair in Frisco
The sooner you notice these red flags, the easier and cheaper the fix. Keep an eye out for the following clues:
- Room-temperature air from the registers even though the AC is running
- Breaker trips or a burning odor at startup
- A hiss or gurgle from the lines, a common sign of leaking refrigerant
- The outdoor unit humming or clicking but the fan not spinning
- Rising electric costs paired with a sticky, uncomfortable house
- Ice on the refrigerant lines or a frozen indoor coil
- Puddles near the air handler or water stains on the ceiling beneath it
- 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. Call (469) 423-7529 at the first sign of trouble.
