York
Overheating Components / Electrical Overload
Burning or electrical smell when furnace runs.
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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
Dust burning off heat exchanger, Overheating blower motor, Loose electrical connections, Failing transformer or control board
How to Fix / Troubleshooting
Safety: If you see smoke or flames, shut off power and gas and call emergency services. Do not ignore persistent burning smells.
- Initial use: A light burning dust smell is normal the first few cycles of the season. It should dissipate within an hour.
- Inspect wiring: With power off, check for discolored or melted wires at the control board, blower motor, and junction box. Tighten loose connections.
- Blower motor temperature: After running, carefully feel the blower motor housing; it will be warm but should not be too hot to touch briefly. Overheating motors need replacement.
- Professional check: Persistent electrical odors require a technician to test current draw and inspect components.
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Repair Difficulty
Medium
3/5
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