Smell of gas near Vaillant boiler, even when not running
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
Emergency safety: Do not operate the boiler. Turn off the gas supply at the main shutoff valve. Do not use electrical switches or naked flames. Ventilate the area by opening windows and doors.
Action:
- Evacuate the area if the smell is strong.
- Contact your gas emergency service or a Gas Safe registered engineer immediately.
Do not attempt to tighten or dismantle gas fittings yourself.
Repair Difficulty
Required Part
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