Saunier Duval
Overheating of electrical or plastic components
Water heater emits a burning or plastic smell during operation
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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
Fan motor overheating, Loose electrical connection causing arcing, Plastic parts too close to flue or burner, Blocked ventilation around appliance
How to Fix / Troubleshooting
Safety first: Turn off power and gas immediately. Do not continue to operate the heater until the cause is found.
Steps:
- Visual inspection: After cooling, remove the cover and look for discolored, melted, or burnt components, especially around the fan, PCB, and wiring.
- Check ventilation: Ensure that the heater has the required clearances and that ventilation grills are not blocked.
- Tighten connections: Inspect and tighten any loose electrical terminals that show signs of heating.
- Replace damaged parts: Any burnt wiring, connectors, or plastic parts must be replaced with genuine Saunier Duval components.
Warning: Burning smells can precede fire. If you are unsure, contact a professional immediately.
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Repair Difficulty
Hard
4/5
Required Part
Flue Fan Assembly
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