An outside unit that hums while the fan stays still is the call we get most in July in Grand Prairie, 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.
When to Call for AC Repair in Grand Prairie
Catching these issues early helps you avoid costly problems. Keep an eye out for the following clues:
- Vents blowing air that is barely cooler than the room
- Rapid on-off cycling that never brings the temperature down
- Clicking or humming outside with no fan movement
- Water dripping from the indoor unit or showing up on the ceiling below
- An iced-over evaporator coil or frozen refrigerant lines
- Breaker trips or a burning odor at startup
- Hissing or bubbling sounds that suggest a refrigerant leak
- Rising electric costs paired with a sticky, uncomfortable house
Act Before It Gets Worse
A failing capacitor, clogged condensate drain, or dirty flame sensor rarely fixes itself and usually gets more expensive to address the longer it runs. If you notice any of these signs, call (972) 920-8559 for a prompt inspection.
