b0
Circulator blower motor is not running when it should be running
This code typically points to
- Loose wiring connection at blower motor power leads or disconnected leads
- Open circuit in inductor or loose wiring connection at inductor (3/4 HP and 1 HP models only)
- Failed circulator blower motor
Next checks to confirm
- Tighten/correct wiring connection
- Verify continuity through inductor and replace if open/short
- Check circulator blower motor and replace if necessary
Escalation
Furnace fails to operate
Reset behavior
Clears after blower-motor power fault is corrected.
Urgent
Fix now