Home/Boiler Fault Codes/Vaillant F61
VAILLANT FAULT CODE
Vaillant F61
Indicates the gas valve is not opening as expected.
WHAT F61 TYPICALLY INDICATES
Indicates the gas valve is not opening as expected.
WHAT TO DO
A gas valve fault must never be investigated or bypassed by anyone other than a Gas Safe registered engineer. This is not a DIY fix — it requires a Gas Safe registered engineer to diagnose and repair safely.
A NOTE ON GAS SAFE REGISTRATION
Any work on the gas side of a boiler in the UK legally requires a Gas Safe registered engineer, it isn't optional. Our engineers are fully Gas Safe registered, and you're always welcome to ask to see ID on the day. This page is general information about what a fault code typically indicates; it is not a substitute for an engineer diagnosing your specific boiler.
Seeing Vaillant F61 on your boiler?
Tell us the code and your postcode. A fully Gas Safe registered engineer will diagnose the actual cause before quoting a fix.
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