What does 22 mean?
Discharge pressure exceeded safe limit. Refrigerant circuit or airflow issue.
Common causes
- Dirty condenser coil
- Failed condenser fan motor
- Refrigerant overcharge
- Non-condensables in system
- Blocked condenser airflow
Diagnostic & testing steps
- 1. Check discharge pressure: should be 350-400 PSI (R-410A) at 95°F
- 2. Clean condenser coil - rinse from inside out
- 3. Verify condenser fan motor is running and spinning correct direction
- 4. Test condenser fan capacitor
- 5. Check for refrigerant overcharge
Tools required
- Manifold gauge set
- Multimeter
- Capacitor tester
OEM parts & part numbers
Condenser Fan Motor, Condenser Fan Capacitor, High Pressure Switch
Part numbers: HC39GE234, P291-4553RS, HK02AA006
Safety warning
⚠️ HIGH PRESSURE: Discharge pressure can exceed 600 PSI at failure. Never loosen fittings with system running.
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