2 red flashes / green OFF
System in high-pressure switch lockout
This code typically points to
- Repeated HPS openings within six hours
- Dirty coil
- Fan failure
- Refrigerant charge issue
Next checks to confirm
- Clean coil
- Verify fan
- Verify charge and head pressure
Escalation
Hard lockout if unresolved.
Reset behavior
Soft lockout; reset by thermostat satisfaction / SYSTEM OFF or shorting TEST >2 sec after fault removal.
Urgent
Fix now