Weishaupt
Sooting / Incomplete Combustion
Boiler room or casing shows signs of soot or black deposits around burner or flue connection.
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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
Insufficient combustion air, Blocked heat exchanger, Incorrect burner nozzle or head (oil), Incorrect gas/air ratio on Weishaupt burner
How to Fix / Troubleshooting
Safety first: Switch off the boiler immediately. Sooting indicates dangerous combustion conditions.
- Do not operate: Do not attempt to run the boiler until the cause is identified and corrected.
- Inspect air supply: Ensure combustion air openings are not blocked and that the boiler room is adequately ventilated.
- Clean heat exchanger and flue: A technician should thoroughly clean the heat exchanger and flue passages.
- Combustion setup: Have a Weishaupt-trained technician check nozzle size (oil), burner head, and adjust combustion with a flue gas analyser.
When to call a professional: Always involve a qualified burner engineer for sooting issues.
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Repair Difficulty
Professional Required
5/5
Required Part
Burner Nozzle / Head (Oil) or Gas Burner Head
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