21 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Baxi Platinum+
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Your boiler has detected an issue with the system that controls the flow of gas, meaning it cannot ignite or stay running to provide heating and hot water.
Your boiler has stopped working because it cannot correctly measure the temperature of the water circulating through your radiators.
Your boiler has detected a communication issue with the sensor that monitors the exhaust gas temperatures, causing it to shut down for safety reasons.
Your boiler is unable to read the temperature of the water returning to it, so it has shut down to prevent potential damage.
Your boiler has detected that it has become too hot and has automatically shut down to prevent damage or overheating.
Your boiler has detected that water is not circulating correctly through the system, so it has shut down to prevent itself from overheating.
Your boiler has detected that the temperature in the exhaust flue is too high, causing it to shut down for safety reasons.
Your boiler has stopped working because it cannot light its internal flame, likely due to a gas supply issue or a blockage.
Your boiler has stopped working because it has detected an issue with the internal gas valve or the way it is communicating with the gas supply.
Your boiler has detected an issue with the internal air circulation fan, which prevents it from igniting safely to provide heating or hot water.
Your boiler is currently unable to properly detect the temperature of your hot water supply, so it has shut down to prevent overheating.
Your boiler has lost the ability to accurately measure the temperature of the water circulating through your radiators, so it has shut down as a precaution.
Your boiler has detected a problem with the sensor that monitors the temperature of the exhaust gases leaving the unit, causing it to shut down for safety reasons.
Your boiler is struggling to accurately detect the temperature of the water being heated for your taps and shower, so it has stopped heating it to prevent overheating.
Your boiler has detected that it has become dangerously hot and has automatically shut down to prevent damage or fire risk.
Your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.
Your boiler is struggling to move water around your heating system correctly, which is preventing it from working safely.
Your boiler has detected that the exhaust gases are becoming too hot near the flue, so it has shut itself down to prevent any damage.
Your boiler is not receiving enough gas or failing to light, so it has shut down as a safety precaution.
Your boiler has stopped working because it cannot detect that the internal fan, which is essential for safely venting combustion gases, is running correctly.
Your boiler is struggling to detect water movement before it fires up, meaning it has paused its operation to prevent potential internal damage.
Not faults — these are normal operating states. Tap to expand.
BoilerFaultCodes