York
Overcurrent / Electrical Short
Furnace occasionally trips the household circuit breaker.
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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, Shorted inducer motor, Short in wiring harness, Overloaded circuit shared with other devices
How to Fix / Troubleshooting
Safety: Repeated breaker trips indicate a serious issue. Do not replace a breaker with a larger size.
- Isolate furnace: Ensure the furnace is on a dedicated circuit as required by code.
- Visual inspection: With power off, inspect wiring for burn marks, melted insulation, or loose connections.
- Motor testing: A technician should measure motor amp draw and insulation resistance. Replace any motor drawing excessive current.
- Do not reset repeatedly: If the breaker trips more than once, leave it off and call a professional.
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Repair Difficulty
Professional Required
5/5
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