BoilerFaultCodesYour boiler has encountered a general electronic system error and needs to be restarted to clear its memory.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: An error has been detected in the Combi, try resetting the boiler.
What causes this fault?
This fault occurs when the boiler's internal computer experiences a communication glitch or a software conflict between the control board and the display. It is essentially a 'electronic crash' that prevents the system from processing safety checks, causing the boiler to shut down for protection. In many cases, it is a temporary error caused by a power surge, but persistent codes often indicate the main circuit board is failing to retain its programming.
DIY fix possible
Locate the 'Reset' button on the boiler control panel.Press and hold the button for 2-3 seconds until the display changes.Wait for the boiler to complete its startup sequence to see if the heating resumes.
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A boiler cover plan would cover faults like rE99 — no call-out fees, no surprises.
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Could it be time for a new boiler?
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