Coleman
Electrical Overload or Short Circuit
Furnace frequently 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 windings, Shorted inducer motor, Pinched high-voltage wire against cabinet, Oversized or failing transformer drawing excess current
How to Fix / Troubleshooting
Safety first: Do not repeatedly reset a breaker that trips immediately; this indicates a serious fault.
Steps to check:
- Visual inspection: With power off, inspect high-voltage wiring from the junction box to the blower, inducer, and transformer for melted insulation or contact with sharp metal edges.
- Motor tests: A technician should measure motor winding resistance and insulation to ground to identify shorted motors.
- Correct breaker size: Verify the furnace breaker size matches the nameplate rating on the Coleman furnace. An undersized breaker may nuisance-trip.
Because of shock and fire risk, diagnosis and repair of breaker-tripping issues should be handled by a qualified technician.
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Repair Difficulty
Professional Required
5/5
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