Worcester Bosch 24/28/35 CDi MkII Fault codes & diagnostics

Your boiler has detected that the water pump is struggling to circulate water properly, which could prevent your home from heating up or providing hot water.

Your boiler's internal computer is struggling to communicate with its primary control brain, causing the system to shut down for safety.

Your boiler has detected that the internal fan responsible for safely removing exhaust gases is not spinning, so it has shut itself down to prevent unsafe operation.

Your boiler has detected that the internal exhaust fan is spinning faster than it should, so it has safely shut itself down to prevent damage.

Your boiler has detected that it is overheating and has automatically switched itself off to prevent damage to the internal components.

Your boiler is trying to start but the internal burner is failing to catch and stay alight.

Your boiler has stopped because the flame inside it went out unexpectedly while it was running.

Your boiler's main computer brain is having a communication error, which means it cannot safely control the heating or hot water functions.

Your boiler has detected an electrical issue with the internal component that controls the gas supply, meaning it cannot safely start or continue to heat your home.

Your boiler’s internal computer has encountered a serious internal error and can no longer control the heating system safely.

Your boiler's main control computer is experiencing a communication error and cannot operate safely, meaning your heating and hot water will be unavailable.

Your boiler's main computer control panel is experiencing an internal error, which has caused it to shut down for safety reasons.

Your boiler’s internal computer is experiencing a communication error or failure, meaning the safety systems have shut it down to prevent improper operation.

Your boiler has detected an issue with its internal computer that controls the burning process, and it has safely shut itself down as a precaution.

Your boiler's internal computer is experiencing a critical error and has stopped working to prevent further damage.

Your boiler’s internal computer has detected a serious communication problem and has safely shut down to prevent further damage.

Your boiler is failing to start correctly because its internal safety checks have detected a timing mismatch during the ignition sequence.

Your boiler's internal computer is experiencing a communication error or failure, which has caused the system to stop working to prevent further damage.

Your boiler's main computer control panel is experiencing a communication error and cannot safely operate the heating or hot water systems.

Your boiler is struggling to breathe properly because it cannot pull in enough air to burn the gas safely, so it has turned itself off to prevent a hazard.

Your boiler is struggling to detect water movement, meaning it cannot confirm the pump is working correctly to distribute heat throughout your home.

Your boiler's computer has detected a temporary internal processing error and has shut itself down to prevent any unsafe operation.

Your boiler is struggling to light because it is sensing an issue while trying to ignite, causing it to lock itself for safety.

Your boiler has detected that the water is heating up unevenly between two internal pipes, causing it to shut down to prevent potential damage.

Your boiler's computer is experiencing an internal communication error and has safely shut itself down to prevent further issues.

Your boiler has detected that the water inside the system has become dangerously hot and has shut itself down to prevent damage or safety risks.

Your boiler has detected that it is overheating and has shut itself down to prevent any damage or safety issues.

Your boiler has detected an internal communication error between its sensors, meaning it cannot accurately monitor temperatures and has shut down as a precaution.

Your boiler's computer is struggling to read internal sensor data correctly, which prevents it from operating safely.

Your boiler is struggling because the internal water pump is not moving water around the system correctly, which could be due to a blockage or trapped air.

Your boiler is unable to detect that the water pump is running, which prevents it from circulating heat through your home.

Your boiler has detected that the water returning to it is dangerously hot, causing it to shut down to prevent damage.

Your boiler has detected an electrical problem with the component responsible for safely monitoring the burner flame, so it has shut down to prevent unsafe operation.

Your boiler is struggling to detect the water pressure inside the system because the sensor that monitors it is either disconnected or faulty.

Your boiler is struggling to detect the water pressure inside the system because the sensor that monitors it is disconnected or experiencing an electrical fault.

Your boiler has detected an internal electrical communication error, meaning it cannot accurately process signals from its own sensors and has shut down as a precaution.

Your boiler's internal computer is having trouble communicating with its main control unit, causing the system to stop working as a precaution.

Your boiler's computer is experiencing a temporary glitch that is preventing it from starting up correctly.

Your boiler has detected that the water inside it is heating up much faster than normal, which suggests there is not enough water circulating through the system safely.

Your boiler is struggling to manage its internal temperature while heating your water, causing it to shut down for safety to prevent overheating.

Your boiler has stopped working because a sensor that monitors the water temperature is sending an incorrect electrical signal, causing the system to shut down for safety.

Your boiler's temperature gauge has stopped sending data, so the system has shut down to prevent it from overheating.

Your boiler is struggling because the electrical power reaching it has dropped below the minimum level required to operate safely.

Your boiler has detected an internal issue where a gas control valve is not closing properly, which prevents it from firing safely.

Your boiler has stopped heating the water for your taps and shower because it does not detect the temperature rising as it expects.

Your boiler is struggling because the internal water pump is either jammed or has trapped air inside it, preventing water from circulating properly to heat your home.

Your boiler has detected an internal computer communication error, meaning it has safely shut itself down to prevent potential damage.

Your boiler has detected that the internal fan responsible for clearing exhaust gases has stopped working, so it has safely shut itself down.

Your boiler is struggling to clear exhaust gases properly, so it has safely shut itself down to prevent any risk of fumes entering your home.

Your boiler's air circulation system is struggling, which means it cannot safely clear waste gases and will stop working to keep your home safe.

Your boiler is struggling to accurately measure the temperature of the water returning to it, so it has stopped working to prevent potential overheating.

Your boiler has detected that the water temperature is behaving unexpectedly compared to its internal safety checks and has stopped running to prevent potential damage.

Your boiler's internal sensor, which monitors the movement of water, is malfunctioning, meaning the system cannot safely confirm if water is flowing correctly.

Your boiler has detected that the water inside is getting dangerously hot and has shut itself down to prevent damage.

Your boiler has detected that it is running much hotter than it should be and has switched itself off to prevent internal damage.

Your boiler has detected an internal software or communication error that is preventing it from operating safely.

Your boiler is failing to light or stay lit, meaning it cannot produce heat or hot water because it has detected an issue with the burner flame.