Vaillant Gas Leak

Strong smell of gas near the Vaillant boiler

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 at boiler, Damaged gas pipe, Faulty gas valve body, Incomplete combustion with flue leak (perceived as gas smell)

Safety: This is an emergency.

Turn off gas: Shut off the gas at the emergency control valve (usually near the meter).
Ventilate: Open windows and doors. Do not use electrical switches, naked flames, or smoke.
Evacuate if strong: Leave the property if the smell is strong or you feel unwell.
Call emergency number: Contact the gas emergency service or your gas supplier immediately. Do not attempt to relight the boiler until it has been checked and declared safe.

Professional Required 5/5

Gas Valve / Gas Pipework

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