Keston Gas Leak at Boiler

Strong smell of gas near the boiler, whether running or off

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

Loose gas union, Faulty gas valve, Damaged gas pipework, Incomplete combustion with flue leak

How to Fix / Troubleshooting

Safety: This is an emergency. Do not operate electrical switches, smoke, or use naked flames. Ventilate the area immediately.

User actions:

Turn off the gas supply at the emergency control valve if safe to do so.
Open windows and doors to disperse gas.
Evacuate the property and contact the gas emergency service and a Gas Safe engineer.
Do not attempt to relight the boiler until it has been checked and declared safe.

Engineer actions:

Perform a tightness test on the gas installation and appliance using approved equipment.
Inspect all gas joints within the Keston boiler, including the gas valve and burner connections, for leaks.
Repair or replace leaking components and retest to confirm integrity.
Check combustion and flue integrity to ensure no products of combustion are entering the property.

Repair Difficulty

Professional Required 5/5

Required Part

Gas Valve Assembly

Check Price on Amazon

We may earn a commission from links on this page.