BoilerFaultCodes.com
FL Low Lockout

Your boiler is accidentally trying to use a feature it doesn't have, which is usually caused by a minor electronic glitch or a recent settings change.

Monitor it

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: This feature is not required on this appliance.

What causes this fault?

This fault occurs when the boiler's internal computer becomes confused and tries to activate a 'flue luxury' feature that wasn't designed for this specific model. It is usually triggered by a brief electrical surge or if the boiler's software settings have accidentally been changed during a service or repair. Most of the time, the boiler simply needs to be told which model it is again to clear the error.

Typical repair cost £0-120 (including labour)

DIY fix possible

Locate the reset button on the boiler control panel.Press and hold the reset button for 2 to 5 seconds.Wait for the boiler to restart; the code should disappear if it was a temporary software error.

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Protect yourself from future repair bills

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

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