De Dietrich
Overheating Electrical Component or Dust Burn-off
Furnace produces a burning or plastic smell when running
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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 on De Dietrich boiler after long inactivity, Overheating pump or fan motor, Loose electrical connection causing arcing, Foreign object touching hot surfaces
How to Fix / Troubleshooting
Safety: If the smell is strong or accompanied by smoke, switch off power immediately and do not use the boiler.
Steps:
- Initial use: A light smell during first use of the season can be normal as dust burns off. It should disappear after a short time.
- Inspect visually: With power off and cooled, remove the front panel and look for discoloured wiring, melted insulation, or foreign objects.
- Check clearances: Ensure no plastic items or insulation are touching the boiler casing or flue.
Professional help: Any sign of overheating components requires inspection and repair by a technician.
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Repair Difficulty
Medium
3/5
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