10 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Baxi Solo / Baxi Megaflo System
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Your boiler has stopped working because it cannot light the internal flame or keep it burning.
Your boiler has detected that it is overheating and has automatically switched itself off to prevent damage.
Your boiler has detected that water is not circulating properly, most likely because the system pressure has dropped too low to operate safely.
Your boiler has stopped working because it is unable to accurately measure the temperature of the water being sent to your radiators.
Your boiler is struggling to breathe because the pipe that vents exhaust gases outside is blocked or faulty, meaning it cannot operate safely.
Your boiler has tried to start but could not ignite the flame, so it has shut itself off for safety.
Your boiler is failing to light the internal flame, which means it cannot produce any heat or hot water and has shut down as a safety precaution.
Your boiler has stopped working because there is either not enough water inside the system or an internal part that moves the water around has stopped running.
Your boiler has detected that it is getting too hot and has automatically switched itself off to prevent any damage or safety issues.
Your boiler is struggling to read its own temperature, so it has turned itself off to avoid heating the water incorrectly.
Not faults — these are normal operating states. Tap to expand.
BoilerFaultCodes