Baxi Gas Leak

Persistent smell of gas near the Baxi water heater, even when it is not firing.

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 on Baxi gas valve inlet, Damaged gas pipework, Internal gas valve leak, Poorly sealed test point

How to Fix / Troubleshooting

Critical safety warning: If you smell gas, do not operate any electrical switches, do not use open flames, and do not attempt to repair the leak yourself.

Immediate actions:

Turn off the gas supply at the main shut-off valve.
Open windows and doors to ventilate the area.
Evacuate the area if the smell is strong.
Contact your gas supplier or a Gas Safe / licensed gas technician immediately.

No further user-level repair is safe in this scenario.

Repair Difficulty

Professional Required 5/5

Required Part

Gas Valve and Gas Pipework

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