Worcester Bosch Highflow 440 CDi Fault codes & diagnostics

Your boiler has lost the ability to accurately measure the temperature of the water returning to it, so it has shut down to prevent potential overheating.

Your boiler is unable to safely move air through its internal system, so it has shut down to prevent any unsafe operation.

Your boiler is trying to start, but it cannot detect a flame, so it has safely shut down to prevent gas from building up.

Your boiler has lost the ability to accurately measure the temperature of the water flowing through the system, so it has shut down to prevent overheating.

Your boiler has detected that a safety sensor meant to monitor heat levels may be faulty or disconnected, so it has shut down to prevent any risk of overheating.

Your boiler has lost communication with a sensor that monitors water temperature, causing it to shut down for safety.

Your boiler has detected that it is running too hot and has automatically shut down to prevent damage, meaning you currently have no heating or hot water.

Your boiler has detected that the internal water pump is stuck or blocked, meaning it cannot circulate heat throughout your home.

Your boiler has detected a faulty internal reading and has shut down as a safety precaution.

Your boiler has failed to light the internal flame during start-up and has safely shut itself down to prevent a build-up of unburnt fuel.

Your boiler is failing to detect that water is moving through the system, which means it cannot safely turn on to provide hot water or heating.

Your boiler has failed to light the internal flame needed to heat your water, so it has shut down as a safety precaution.

Your boiler is struggling to drain away the water produced during normal operation, which is causing it to automatically shut down as a safety precaution.

Your boiler's internal computer is experiencing an error and cannot safely ignite the burner, meaning you currently have no heating or hot water.

Your boiler has stopped working because the water pressure inside the heating system has dropped too low to operate safely.

Your boiler has detected that the internal fan is moving too slowly to safely vent combustion gases, so it has shut down to keep your home safe.

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 has stopped working because it is unable to accurately measure the temperature of the water being heated inside the system.

Your boiler has detected a critical internal error and has safely shut itself down to prevent potential damage.

Your boiler has stopped because the water pressure inside your heating system has dropped too low to function safely.

Your boiler is failing to register a safe internal connection, which is preventing it from starting up reliably.

Your boiler is failing to light the internal flame needed to heat your water, so it has safely shut itself down to prevent gas from building up.

Your boiler has lost the signal from the sensor that monitors your hot water temperature, which means it cannot accurately heat your water.

Your boiler has detected that the internal pump, which pushes heat around your home, is not spinning correctly and the system has shut down to prevent damage.

Your boiler has lost communication with one of its internal control units, meaning it cannot properly manage your heating or hot water functions.

Your boiler's internal computer has lost contact with the specific memory card that tells it how to operate your particular model.

Your boiler's fan system is failing to confirm that it is moving air correctly, which stops the boiler from firing up to prevent unsafe operation.

Your boiler has detected that the water temperature has risen too high and has temporarily shut itself down to prevent damage.

Your boiler is unable to safely drain away the water it creates while running, so it has stopped working to prevent internal flooding.

Your boiler has detected that the internal water storage tank is overfilling, which forces the system to stop working to prevent internal flooding or water damage.

Your boiler has stopped working because it has lost the connection to the sensor that monitors its internal temperature, meaning it cannot safely regulate heat.

Your boiler is currently unable to accurately measure the temperature of the water inside its internal storage tank, which means your hot water supply will not work until this sensor is fixed.

Your boiler has stopped working because it cannot detect that water is flowing through the system, leaving you without heating or hot water.

Your boiler has stopped working because it cannot detect the temperature of the water flowing through the system, likely due to a loose wire or a faulty sensor connection.

Your boiler is failing to light the internal burner, so it has safely shut itself down to prevent wasting gas.

Your boiler is struggling to keep the flame lit once it starts, causing it to shut down for safety.

Your boiler has detected that the internal water storage tank is becoming dangerously hot, so it has safely shut itself down to prevent damage.

Your boiler has detected that the internal water storage tank has become too hot and has shut itself down as a safety precaution.

Your boiler is unable to safely drain away the water it creates during normal operation, causing it to block its own internal system and switch off.

Your boiler is failing to ignite the burner at the required power, meaning it cannot provide heating or hot water.

Your boiler is struggling to switch between providing heating and hot water, meaning you likely have no hot water available.

Your boiler is unable to safely drain away excess water produced during operation, which has caused it to stop working to prevent internal damage.