Brötje
Incomplete combustion / sooting
Soot deposits around flue terminal or on boiler casing, no immediate error code
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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
Incorrect gas/air ratio, Blocked burner, Insufficient combustion air, Flue restriction
How to Fix / Troubleshooting
Safety: Sooting indicates dangerous combustion and potential CO production. Do not continue to operate the boiler.
- Turn off power and gas to the Brötje furnace.
- Have a qualified technician perform a full burner service: clean burner and heat exchanger, check flue, and perform combustion analysis.
- Correct any gas pressure or air supply issues.
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Repair Difficulty
Professional Required
5/5
Required Part
Premix Burner / Primary Heat Exchanger
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