Worcester Bosch Greenstar 25CDi Fault codes & diagnostics

Your boiler has lost water pressure, meaning there isn't enough water inside for the pump to circulate properly.

Your boiler's internal computer brain is unable to recognize a small identifying chip that tells it how to operate safely.

Your boiler has identified that the fan responsible for clearing exhaust fumes is not spinning at the correct speed, preventing it from starting safely.

Your boiler's temperature sensor is failing to communicate correctly, which prevents the system from knowing how hot the water is and causes it to shut down for safety.

Your boiler has overheated because the water inside is not moving correctly or has become too hot, causing a safety sensor to shut the system down.

Your boiler is failing to light because it cannot detect a flame, meaning your heating and hot water will not work.

Your boiler's internal computer has encountered a critical communication error and can no longer control the heating process safely.

Your boiler is sensing a flame even when it should be turned off, causing the system to lock down for safety.

Your boiler is struggling to accurately measure the temperature of the water it is heating, which means it has stopped providing hot water to prevent it from overheating.

Your boiler's internal computer is failing to communicate with a small memory key, meaning it has forgotten its specific configuration and cannot operate.

Your boiler's internal fan is struggling to move air effectively, so it has safely shut itself down to prevent any unsafe operation.

Your boiler has lost the ability to accurately measure the water temperature, so it has shut down as a precaution to prevent overheating.

Your boiler has lost its unique configuration settings, which means the main internal controller cannot read the instructions it needs to operate correctly.

Your boiler is currently unable to read its internal temperature, so it has safely shut itself down to prevent overheating.

Your boiler has detected that it is running too hot and has automatically shut itself down to prevent damage.

Your boiler is struggling to push air through its system because the internal fan is not spinning at the required speed, which prevents it from firing up safely.

Your boiler is unable to light the burner, meaning it cannot produce heat or hot water because it does not detect a flame.

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