A022_F
Main limit switch open (latched alarm)
This code typically points to
- Public booklet does not expose per-code list
- Overheating / airflow issues implied by safety naming
Next checks to confirm
- Check airflow, limits, and blower operation
- Contractor app holds detailed tree
Escalation
Latched alarm state; one-hour lockout family via A111_F
Reset behavior
Clears when safety is restored; one-hour lockout follows A111_F if escalated.
Safety Critical
Immediate concern