A humming outdoor unit with a fan that will not turn is the classic summer service call in Boulder, CO, 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.
Signs You Need AC Repair in Boulder
Catching these issues early helps you avoid costly problems. These are the signals our technicians see most often:
- Clicking or humming outside with no fan movement
- Room-temperature air from the registers even though the AC is running
- Rising electric costs paired with a sticky, uncomfortable house
- A burning smell or repeated breaker trips when the AC starts
- The system short-cycling every few minutes without cooling the house
- Water dripping from the indoor unit or showing up on the ceiling below
- Ice on the refrigerant lines or a frozen indoor coil
- Bubbling or hissing noises that point to a possible refrigerant leak
Don't Wait for a Total Failure
Most HVAC failures start small, a weak capacitor, a squealing blower, a system that runs a little longer each week. If you notice any of these signs, call (970) 602-4925 for a prompt inspection.
