Strong burning or electrical smell when furnace runs.
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.
Possible Causes
How to Fix / Troubleshooting
Safety warning: If you smell burning plastic, see smoke, or suspect an electrical fire, shut off power at the breaker and call emergency services.
Step-by-step checks:
- 1. First-season operation: A mild burning dust smell is common the first few cycles each season. It should dissipate within an hour.
- 2. Inspect blower motor: With power off, smell near the blower motor. If there is a strong burnt odor or visible discoloration, do not run the furnace.
- 3. Check wiring: Look for melted insulation or darkened connectors on the control board and near the burners.
When to call a professional: Any persistent burning or electrical smell requires professional inspection. The technician may replace the blower motor, wiring harness, or Philco control board.