Ducane
Overcurrent / Electrical Short
Furnace frequently trips the household breaker when starting
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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 on Ducane furnace, Damaged wiring harness, Incorrect breaker size for furnace
How to Fix / Troubleshooting
Safety first: Do not repeatedly reset a tripping breaker. This is a fire hazard.
- Step 1 – Leave breaker off: Until the cause is identified, keep the breaker off.
- Step 2 – Visual inspection: With breaker off, inspect wiring inside the furnace for burnt insulation, loose wires, or signs of arcing.
- Step 3 – Motor check: Try spinning blower and inducer wheels by hand; seized motors often draw high current.
- Step 4 – Professional service: A technician must perform current draw and insulation resistance tests and replace any failed motors or wiring.
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Repair Difficulty
Professional Required
5/5
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