02
High-side fault / high-pressure fault
This code typically points to
- Restricted outdoor airflow
- Condenser coil dirty or blocked
- Condenser fan motor fault
- Refrigerant overcharge
- Non-condensable gases in system
Next checks to confirm
- Inspect and clean outdoor coil
- Verify condenser fan motor operation and speed
- Check refrigerant charge level
- Evacuate and recharge if non-condensables suspected
Escalation
Outdoor unit locks out compressor on high-pressure event
Reset behavior
Auto-clears after fault condition clears and anti-short-cycle timer completes OR manually cleared by cycling 24 VAC.
Urgent
Fix now