Armstrong Air
Overcurrent / Electrical Short
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, Shorted wiring to cabinet, Oversized or failing transformer
How to Fix / Troubleshooting
Safety: Repeated breaker tripping indicates a serious electrical problem. Do not keep resetting the breaker. Turn it off and call a professional if you are not trained.
Steps to check (basic):
- Visual inspection: Look for burnt wires, melted insulation, or signs of arcing inside the furnace cabinet.
- Isolate motors: A technician can disconnect the blower and inducer motors one at a time to identify which component is causing the overcurrent.
- Replace failed motor or wiring: Once identified, replace the faulty motor or repair wiring with Armstrong Air-approved parts.
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Repair Difficulty
Professional Required
5/5
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