BoilerFaultCodesYour boiler has switched itself off as a safety precaution because it has either failed to light or has become too hot.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: The boiler has failed to ignite or has overheated, when this happens the boiler automatically shuts down and requires to be reset manually.
What causes this fault?
This fault occurs when the boiler's internal sensors detect that the water temperature has exceeded a safe limit or the flame failed to light after several attempts. Often, this is caused by a lack of water flow through the heat exchanger, perhaps due to a failing pump or an airlock, triggering the safety shut-off to prevent internal damage. It can also be caused by a build-up of debris or a fault with the ignition system preventing a stable flame.
This issue is more frequent in winter when the heating system is under maximum load, which can highlight existing circulation problems or pump fatigue.
DIY fix possible
Locate the mode selector switch on the front control panel.Turn the switch to the 'RESET' position and hold it for a few seconds.Turn the switch back to the original 'Heating' or 'Hot Water' position and wait for the boiler to restart.
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A boiler cover plan would cover faults like Reset Light (Overheat) — no call-out fees, no surprises.
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