11 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
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Your boiler has failed to ignite because it is not receiving gas or has detected an issue with the internal airflow, meaning you currently have no heating or hot water.
Your boiler is failing to circulate water properly because it cannot sense the flow it needs to heat your home.
Your boiler is struggling to clear air and gases away properly because the exhaust pipe or an internal sensor is blocked with debris.
Your boiler has stopped working because the water pressure inside the system has dropped too low.
Your boiler is struggling to talk to your room thermostat or remote control unit, which is preventing it from knowing when to turn the heating on.
Your boiler is struggling to detect the temperature of your hot water, which likely means you will have no hot water available until it is fixed.
Your boiler has stopped working because it is unable to accurately measure the temperature of the water inside the unit.
Your boiler has detected that it is running too hot and has automatically shut down to prevent damage to its internal components.
Your boiler's internal computer is malfunctioning and cannot correctly process its own instructions, which prevents it from operating safely.
Your boiler is unable to properly drain away the water it creates during normal operation, which is stopping it from running safely.
Your boiler is struggling to detect that it is safely draining away the water created during its operation, causing it to stop working to prevent internal damage.
BoilerFaultCodes