12 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
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Your boiler has detected a problem with its primary temperature sensor and has shut down as a safety precaution to prevent overheating.
Your boiler has stopped working because it is unable to accurately read the temperature of the water inside the system due to a faulty sensor.
Your boiler has detected a problem with its primary temperature sensor and has shut down as a safety precaution to prevent overheating.
Your boiler has detected a problem with its primary temperature sensor and has shut down as a safety precaution to prevent overheating.
Your boiler has detected a problem with its primary temperature sensor and has shut down as a safety precaution to prevent overheating.
Your boiler has detected a problem with one of its internal temperature sensors, which prevents it from heating your home or water safely.
Your boiler has detected a problem with one of its internal temperature sensors, which prevents it from heating your home or water safely.
Your boiler has detected an issue with one of its internal temperature sensors, which means it has stopped working to keep you safe and prevent potential overheating.
Your boiler has detected a problem with one of its internal temperature sensors, which prevents it from heating your home or water safely.
Your boiler has detected a problem with one of its internal temperature sensors, which prevents it from heating your home or water safely.
Your boiler's internal control board cannot safely communicate with the gas valve, preventing the system from igniting for your heating and hot water.
Your boiler's internal control board cannot safely communicate with the gas valve, preventing the system from igniting for your heating and hot water.
Not faults — these are normal operating states. Tap to expand.
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BoilerFaultCodes