23 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
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Your boiler's temperature sensor is providing faulty readings, so the system has shut down to prevent overheating or operating incorrectly.
Your boiler has detected an issue 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 read the temperature of the water returning to it, so it has stopped working to prevent potential damage.
Your boiler has detected that the water inside has reached an excessively high temperature.
Your boiler is struggling to move water through the system effectively, which is causing it to shut down to prevent overheating.
Your boiler has detected an internal issue and temporarily shut down for safety.
Your boiler has detected that it is overheating and has automatically shut down to prevent damage because the internal pump is not moving water correctly.
Your boiler has detected an internal control or electrical system error and requires professional attention to reset safely.
Your boiler has detected that it is getting too hot and has automatically shut itself down to prevent damage.
Your boiler has detected that the water pressure inside your heating system is currently too high for safe operation.
Your boiler has stopped working because the amount of water circulating inside your heating system has dropped below the required level.
Your Baxi boiler has detected a general internal fault that is causing the display to flash and needs attention from a heating engineer.
Your boiler is failing to move hot water around your radiators, likely because the internal pump is blocked, seized, or air is trapped in the system.
Your boiler is trying to start but the flame is not staying lit, which means you currently have no heating or hot water.
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 failed to ignite or lost its flame, meaning it has temporarily stopped producing heating and hot water for your safety.
Your boiler is trying to start but cannot detect a flame, likely because the gas supply is blocked or the ignition system has failed.
Your boiler has attempted to light the gas flame multiple times but has failed, so it has safely shut down to prevent gas from escaping.
Your boiler has detected a fault with the fan or its speed sensor, which prevents the boiler from safely igniting and providing heating or hot water.
Your boiler has detected that the internal fan responsible for safely venting exhaust gases is not working or communicating correctly, so it has shut down to prevent unsafe operation.
Your boiler has lost the ability to measure the temperature of your hot water, so it has safely shut down to prevent overheating.
Your boiler has detected a flame inside the unit when it shouldn't be there, so it has automatically shut down to keep your home safe.
Your boiler has stopped working because the water pressure inside the system has dropped too low.
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BoilerFaultCodes