Boiler emits smell of gas or combustion fumes
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: If you smell gas, do not operate electrical switches, do not use naked flames, and evacuate the area. Turn off the gas at the meter if safe to do so and call the gas emergency number and a gas-safe engineer immediately.
- Do not use the boiler: Leave the boiler switched off until it has been inspected.
- Ventilate: Open windows and doors to disperse gas or fumes.
- Technician tasks: A qualified engineer must perform a gas tightness test, inspect and repair gas joints, replace the burner door gasket if leaking, and check the entire flue system.
Repair Difficulty
Required Part
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