F.61
FAULT CODE
Vaillant
Gas Valve Regulation Error
High Severity
Engineer Required
The gas valve has an electronic fault affecting how it regulates gas flow. This is a safety-critical fault requiring professional attention.
Step-by-Step Fix Guide
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Step 1
Do not attempt repairs
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Step 2
Turn off the boiler
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Step 3 Engineer only
Call a Gas Safe registered engineer to inspect and test the gas valve assembly and wiring loom
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.