HVAC Diagnose

Pick a symptom — get causes, checks, and fixes.

AirCompDX - Field Reference for Air Compressor Techs
HVAC home
Cooling
AC running but not coolingEvaporator coil freezing / ice on lines
Compressor
Compressor hums then trips (won't start)Compressor short-cycles (on/off rapidly)
Heating / heat pump
Heat pump blowing cold air in heat mode
Airflow
Weak airflow at supply registers
Electrical
Outdoor unit trips breaker
Refrigerant
High head pressure / unit cycling on HP