Your boiler is struggling to talk to the gas valve, which means it cannot safely light the flame to provide heating or hot water.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Gas valve control fault
What causes this fault?
This fault occurs when the boiler's main computer loses the ability to send signals to the gas valve, which is the component responsible for letting fuel into the burner. The most common reason is an internal electronic failure within the gas valve itself or a fault on the main circuit board that prevents it from controlling the combustion process safely.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like F.61 — no call-out fees, no surprises.
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Vaillant ecoMAX is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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