Junkers
Overheating Electrical Component
Furnace emits smell of burning plastic or electrical smell
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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
Overheating pump motor, Failing fan motor, Loose electrical connection causing arcing, Faulty control board component
How to Fix / Troubleshooting
Safety first: Turn off power immediately at the main switch. Do not continue to operate the furnace.
- 1. Visual inspection: After cooling, remove the front cover and inspect for discoloured or melted wiring, connectors, or components.
- 2. Check pump and fan: Smell near the pump and fan motors. If either is very hot or shows signs of melting, replace the affected motor.
- 3. Tighten terminals: Inspect and tighten all accessible electrical terminals to prevent arcing.
- 4. PCB inspection: Look for burnt areas on the control board. Replace the PCB if any damage is found.
- 5. Professional diagnosis: If the source of the smell is unclear, have a qualified technician perform a full electrical safety check.
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Repair Difficulty
Hard
4/5
Required Part
Circulation Pump
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