Sime Gas Leak / Flue Gas Escape

Boiler emits a strong smell of gas or combustion fumes

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

Loose gas connection, Cracked burner seal, Damaged flue joint, Corroded flue pipe

Danger: If you smell gas, do not operate electrical switches, smoke, or use naked flames.

Turn off gas: Close the gas isolation valve to the boiler and, if necessary, at the meter.
Ventilate: Open windows and doors to disperse gas or fumes.
Evacuate if necessary: Leave the property if the smell is strong or persistent.
Call emergency services or Gas Safe engineer: Do not attempt to repair gas or flue components yourself. A qualified engineer must pressure-test the gas line and inspect the flue and combustion chamber seals.

Professional Required 5/5

Gas Valve and Flue System

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