19 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Avanta Ace
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Your boiler is currently taking a short, scheduled break to manage its internal temperature before restarting automatically.
Your boiler has detected a problem with its internal temperature sensors, meaning it cannot accurately monitor the water temperature and has shut down as a safety precaution.
Your boiler is struggling to ignite or detect a flame, causing the system to stop as a safety precaution.
Your boiler has detected that the water inside is getting too hot too quickly, usually because there isn't enough water pressure or the water isn't moving through the pipes properly.
Your boiler has detected that water is not circulating correctly, often because there is trapped air or the system pressure is too low.
Your boiler has detected an internal electrical safety fault or a problem with how it is grounded, causing it to shut down to prevent damage.
Your boiler is failing to light because it cannot detect a flame after several attempts to start up.
Your boiler is failing to light the flame or keep it running, which means it cannot provide you with heating or hot water.
Your boiler is detecting a flame inside the unit even when it has been instructed to switch off, which indicates a serious internal safety issue.
Your boiler has detected an internal communication error between its main electrical parts and has shut down for safety.
Your boiler has detected that the internal component responsible for pushing air out of the flue is not spinning correctly, which prevents the boiler from firing up safely.
Your boiler is struggling to operate because the internal electronics have detected a general communication or system error that is preventing it from firing up.
Your boiler has detected that the internal casing is getting too hot, indicating it is struggling to ventilate correctly or is running too hot internally.
Your boiler has detected an internal communication error and has safely shut itself down to prevent further issues.
Your boiler has detected that some of its internal settings are outside of the allowed range, preventing it from operating safely.
Your boiler's internal computer has detected an error in its configuration settings and needs a professional to reset internal parameters.
Your boiler's computer is having trouble reading its own internal settings and needs to be reset or professionally updated to function correctly.
Your boiler's internal computer has suffered a software failure and can no longer process the settings needed to operate safely.
Your boiler has lost its programmed settings and needs to be reconfigured by a professional to operate correctly.
Not faults — these are normal operating states. Tap to expand.
BoilerFaultCodes