Burnham
Flue Gas Spillage or Venting Problem
Boiler or flue area smells like exhaust or fumes, especially 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
Blocked chimney or vent, Cracked flue pipe, Negative building pressure causing backdraft, Failed draft hood or inducer
How to Fix / Troubleshooting
Safety first: This can be extremely dangerous due to carbon monoxide. Turn off the boiler immediately, ventilate the area, and do not operate the boiler until the issue is resolved.
- Check vent connections: Visually inspect vent pipes for disconnections, cracks, or corrosion holes. Do not attempt to run the boiler with damaged venting.
- Look for blockages: Outside, check that the vent termination is clear of snow, nests, or debris.
- Avoid exhaust fans: Strong kitchen or bath fans can cause backdrafting. Do not run them until venting is corrected.
- Install/verify CO detectors: Ensure working carbon monoxide detectors are installed near sleeping areas and near the boiler.
- Call a qualified technician or chimney professional: Venting issues must be corrected before the boiler is used again.
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Repair Difficulty
Professional Required
5/5
Required Part
Vent Pipe Assembly
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