AC Running but Not Cooling? Common Causes in Colorado Springs Homes

Quick checks first

Before calling for AC repair, look at these:

• Thermostat set to COOL with the fan on AUTO
• A clean air filter
• Outdoor unit clear of cottonwood fluff, grass and debris
• Both breakers on, including the disconnect next to the outdoor unit
• Supply vents open and not blocked by furniture

Problems that need a technician

A failed capacitor, low refrigerant from a leak, a frozen evaporator coil or a bad contactor are common causes. Ice on the copper lines or the indoor coil means turn the AC off and let it thaw before calling. Running it frozen can damage the compressor.

Why Colorado sun matters

Strong high-altitude sun heats attics and upstairs rooms fast. If only the upstairs stays warm, the cause may be ductwork, insulation or airflow balance, not the AC itself.