BoilerFaultCodes.com
F.62 Emergency Lockout

Your boiler has detected that the gas valve is not closing as quickly as it should, preventing the unit from shutting down the burner safely.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now — this fault can be dangerous if ignored.

Technical description: Fuel valve shut-off delay fault

What causes this fault?

This fault occurs when the boiler's internal computer detects that the gas flame is staying lit even after it has commanded the gas valve to close. The most common reason is a physical stickiness within the gas valve itself or a communication error from the main circuit board that prevents the fuel supply from being cut off instantly.

Typical repair cost £250-£550 (including labour)

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.

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Protect yourself from future repair bills

A boiler cover plan would cover faults like F.62 — no call-out fees, no surprises.

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