BoilerFaultCodesYour boiler has encountered a general internal system fault and has locked itself out for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Internal fault. Reset
What causes this fault?
A solid red light indicates that the boiler's internal safety system has detected a generic malfunction, preventing it from firing up. This is often caused by a failure in the ignition process or a breakdown in communication between the main control board and vital components like the gas valve. While a simple reset may temporarily clear it, the fault usually points to a failing part that is no longer operating within safe limits.
DIY fix possible
Locate the mode selector switch on the front control panel.Turn the switch to the 'OFF/RESET' position and wait for 5 seconds.Turn the switch back to either the 'Hot Water' or 'Heating and Hot Water' position.
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