BoilerFaultCodes.com
F.62 Emergency Lockout

Your boiler has detected that the gas flame is not turning off when it should, which is preventing the system from running 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: Error with gas valve – switch off delay

What causes this fault?

This fault occurs when the boiler's control system detects that the gas flame is still burning even after it has told the gas valve to close. The most common reason is a mechanical failure within the gas valve itself, but it can also be caused by a faulty circuit board incorrectly sensing a flame that isn't actually there.

Typical repair cost £180-450 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

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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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