Alpha
Overcurrent on Furnace Circuit
Furnace occasionally trips the household circuit breaker during startup.
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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
Blower motor drawing excessive current, Shorted wiring in furnace junction box, Failing draft inducer motor, Incorrect breaker size for Alpha furnace
How to Fix / Troubleshooting
Safety: Do not repeatedly reset a tripping breaker. This can cause fire hazards.
- Visual inspection: With power off, inspect wiring inside the furnace junction box and around motors for burns or loose connections.
- Isolate cause: Note whether the breaker trips when the inducer starts, when the blower starts, or randomly. Share this with a technician.
Motor current draw and wiring integrity should be tested by a qualified technician. Do not upsize the breaker.
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Repair Difficulty
Hard
4/5
Required Part
Alpha ECM Blower Motor
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