Weishaupt
Overheating Component / Electrical Overload
Water heater emits a burning smell or plastic odor 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
Dust burning off heat exchanger (new install), Overheating pump or fan motor, Loose electrical connection causing arcing, Blocked air intake causing high temperatures
How to Fix / Troubleshooting
Safety: If you see smoke or suspect fire, turn off power and gas immediately and contact emergency services.
- New installation: A slight smell during the first few hours of operation can be normal as oils burn off. This should dissipate quickly.
- Check air intake: Ensure the Weishaupt air intake and flue are not blocked, which can cause overheating.
- Inspect components: With power off, look for discolored plastic, melted insulation, or scorch marks on wiring and connectors.
- Tighten terminals: Loose mains or high-current terminals can overheat. A qualified person should tighten them.
- Replace overheated parts: Any component showing signs of thermal damage should be replaced.
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Repair Difficulty
Hard
4/5
Required Part
Circulation Pump Motor
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