AirComp
DX
Field reference for compressor & HVAC techs
Guided Diagnostic
Symptom → likely causes → next tests.
HVAC home
Restart
What is the primary complaint?
Pick the closest match. You can back up at any step.
No cooling / weak cooling
No heating / weak heating
System won't turn on at all
System runs constantly / short-cycles
Ice on lines or coil
Water leak / condensate issue
Noise / smell / trip breaker