BoilerFaultCodesYour boiler has temporarily lost its flame while running and is attempting to restart itself automatically.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Flame loss during operation. This is a temporary error, wait for the boiler to re-ignite.
What causes this fault?
This fault occurs when the boiler's control system loses the signal that a flame is present while it is already firing. The most common reason is a dirty or worn flame sensing probe that can no longer 'see' the heat, or a temporary fluctuation in the gas supply that caused the burner to flicker out.
DIY fix possible
Wait for the boiler to complete its automatic restart processCheck that your external gas supply is turned on (check other gas appliances)Reset the boiler if the error persists after several minutes
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 11-67 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.