Boiler or flue area smells of fumes or exhaust; occupants may feel unwell or notice condensation/soot.
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.
Possible Causes
How to Fix / Troubleshooting
Critical safety warning: Turn off the boiler and do not use it. Open windows and doors to ventilate. If you suspect carbon monoxide, leave the property and call emergency services and a Gas Safe engineer.
Do not attempt to dismantle or repair the flue or burner yourself. A professional must test combustion, inspect the flue and heat exchanger, and rectify any faults.
Repair Difficulty
Required Part
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