Day & Night
Overcurrent / Electrical Short
Furnace frequently trips the household breaker when starting or during operation.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Shorted blower motor windings, shorted inducer motor, damaged wiring harness, incorrect breaker size
How to Fix / Troubleshooting
Critical safety: Repeated breaker tripping indicates a serious electrical problem. Do not repeatedly reset the breaker.
- Identify pattern: Note whether the breaker trips when the inducer starts, when the ignitor energizes, or when the blower starts.
- Visual inspection: With power OFF, inspect wiring inside the furnace for melted insulation, loose connections, or wires rubbing on sharp metal edges.
- Isolate components: A technician can disconnect motors one at a time to identify the failing component.
Because of shock and fire risk, have a licensed technician diagnose and repair electrical shorts.
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Repair Difficulty
Professional Required
5/5
Required Part
Indoor Blower Motor
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