Thermia
Electrical Overheating / Component Failure
Furnace emits a strong metallic or electrical burning smell during operation.
Advertisements
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.
Advertisements
Possible Causes
Overheating blower motor, Failing transformer, Loose electrical connections on Thermia control board, Shorted wiring
How to Fix / Troubleshooting
Critical safety warning: Turn off power at the breaker immediately. Do not operate the furnace until the source of the smell is identified.
- 1. Inspect blower motor: Check for discoloration, melted insulation, or burnt smell near the blower motor. If present, the motor likely needs replacement.
- 2. Examine control board and wiring: Look for burnt spots, melted connectors, or charred insulation on the Thermia control board and wiring harnesses.
- 3. Do not attempt temporary fixes: Electrical overheating can cause fire. Components showing signs of burning must be replaced, not repaired with tape.
- 4. Call a professional: Have a licensed technician diagnose and replace any damaged electrical components.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Blower Motor Assembly
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements