3
Inducer or Pressure Switch Error
This code typically points to
- Inducer fault
- Pressure-switch fault
Next checks to confirm
- Check pressure switch closing/opening behavior
- Verify inducer operation
Escalation
In 2nd stage: inducer fault forces transition to 1st stage for 10 minutes before retry. In 1st stage: system shuts down and waits 30 seconds before attempting first-stage reestablishment.
Reset behavior
Automatic retry per above; full lockout reset if needed.
Urgent
Fix now