6 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
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Your boiler has stopped working because the internal pump, which moves hot water around your pipes and radiators, is either jammed or has suffered an electrical failure.
Your boiler has detected trapped air or a blockage that is stopping water from flowing through your heating system correctly.
Your boiler has detected a communication error between its internal temperature sensors, which means it cannot safely monitor the water temperature and has shut down as a precaution.
Your boiler's internal thermometers are misreading the temperature or have failed, which has caused the system to shut down for safety.
Your boiler's internal thermometers are misreading the temperature or have failed, which has caused the system to shut down for safety.
Your boiler is simply letting you know that its annual routine service is now due to ensure it continues running safely and efficiently.
BoilerFaultCodes