Worcester Bosch Greenstar 1000 Fault codes & diagnostics

Your boiler has detected that the water inside the unit is getting hotter than the temperature setting, so it has purposefully turned itself off to prevent overheating.

Your boiler has detected that the water leaving the boiler is much hotter than the water returning to it, suggesting the system is struggling to circulate heat properly.

Your boiler has detected that the internal fan is not spinning as expected during start-up, so it has safely shut down to prevent unsafe operation.

Your boiler has lost the connection to a temperature sensor, which prevents it from knowing how hot the water is and forces it to shut down for safety.

Your boiler has lost the connection to one of its temperature sensors, meaning it cannot accurately measure how hot the water is and has stopped working as a safety precaution.

Your boiler has switched itself off because it has detected an unsafe rise in internal temperature and needs to be inspected by a professional.

Your boiler is attempting to start but is unable to detect a steady flame, so it has safely shut down to prevent gas from escaping.

Your boiler has detected a sensor error where it believes a flame is present when it isn't, and it has safely locked itself out to prevent any issues.

Your boiler's flame has gone out while it was trying to heat your water, which means the boiler has safely shut itself down to prevent any issues.

Your boiler has been intentionally switched off or put into standby mode by an external device, such as a smart thermostat, a programmer, or a safety control system.

Your boiler's computer is having trouble recognising its own internal settings, which is preventing it from starting up correctly.

Your boiler is not detecting the electrical connection to the gas supply mechanism, meaning it cannot safely ignite to provide heating or hot water.

Your boiler's internal computer is confused because its software settings don't match the specific model hardware installed.

Your boiler has detected a general internal communication failure, meaning it cannot safely operate its main control systems.

Your boiler's main control unit has identified an internal electronic error and has shut down to prevent potential damage.

Your boiler has lost the signal from one of its internal temperature sensors, meaning it cannot correctly measure the heat of the water and has stopped running to stay safe.

Your boiler has lost the connection to one of its temperature sensors, which is preventing it from working correctly.

Your boiler's internal computer is receiving a signal that falls outside of its expected operating parameters, causing it to shut down for safety.

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

Your boiler's computer has encountered an internal error and needs a reset or a service technician to investigate the control system.

Your boiler's internal computer has detected a serious communication failure during its safety check, preventing it from starting up safely.

Your boiler's internal computer is experiencing a software memory error, preventing it from operating correctly.

Your boiler's internal computer is experiencing a memory error and cannot safely operate the system.

Your boiler's internal computer is experiencing a memory error, meaning it has lost its stored settings and cannot safely manage its operations.

Your boiler's internal computer is experiencing a temporary software glitch and has shut down to prevent any unsafe operation.

Your boiler has detected an internal communication error with its main control unit that is preventing it from operating correctly.

The boiler's internal computer is experiencing a temporary software glitch and cannot properly communicate with its internal systems.

Your boiler's computer is having trouble starting up its internal system properly, which is preventing it from firing up.

Your boiler has detected that the flame is not burning as it should and has shut itself down to keep your home safe.

Your boiler has detected that the flame-making process has stopped, preventing your heating or hot water from working.

Your boiler is shutting down because the water inside is heating up much faster than it is moving, which often means there is an internal blockage or a pump issue.

Your boiler has detected that hot water is flowing the wrong way or the pipes are incorrectly connected, causing it to shut down to prevent damage.

Your boiler has lost the ability to read the temperature of the water inside it, so it has shut down to stay safe.

Your boiler has detected an internal electronic error during a safety self-test and has shut itself down to prevent unsafe operation.

Your boiler's internal computer chip is not communicating correctly with its main control board, which prevents the unit from starting safely.

Your boiler's computer is having trouble communicating with its internal memory, which prevents it from safely operating your heating and hot water.

Your boiler has detected an internal communication error and has safely shut itself down to prevent it from operating incorrectly.

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

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

Your boiler's main control computer is experiencing an internal error and cannot operate safely, meaning your heating and hot water will not work.

Your boiler is struggling to control the gas flow needed to heat your home, so it has safely shut itself down to prevent any issues.

Your boiler has detected an issue with the control system that regulates the gas flow, meaning it has switched itself off to stay safe and is currently unable to provide heating or hot water.

Your boiler has stopped heating because the flame inside went out while it was trying to run.

Your boiler has detected a communication error between its internal electronic brains, causing it to shut down for safety.

Your boiler has detected an internal communication failure between its main computer and the main heating component, preventing it from starting safely.

The internal computer in your boiler has encountered a major software error and has stopped operating to prevent further damage.

Your boiler's electronic control system is not receiving the correct amount of electrical power, preventing it from starting safely.

Your boiler's internal computer is struggling to recognise the specific settings for your model, causing it to shut down for safety.

Your boiler is trying to start but is failing to stay on because it cannot detect a stable flame.

Your boiler has attempted to ignite several times but is failing to stay lit, so it has shut down as a safety precaution.

Your boiler is failing to light the internal flame needed to produce heat and hot water.

Your boiler is repeatedly trying to stay lit but failing, which means it will stop working to keep you safe.

Your boiler is having trouble confirming that the burner is lit safely, so it has stopped working to prevent any potential risks.

Your boiler has detected that the internal plumbing settings do not match the physical components installed, preventing it from functioning correctly.

Your boiler has detected a temporary internal computer glitch that is preventing it from starting up correctly.

Your boiler's internal computer is experiencing a communication error or failure and is unable to operate safely.

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

Your boiler's main control computer is experiencing a communication or internal processing error, causing it to shut down to prevent damage.

Your boiler is unable to detect that its internal air fan is spinning, so it has safely shut itself down to prevent operation without proper ventilation.

Your boiler has stopped working because the internal component responsible for clearing exhaust gases is not spinning, which prevents the unit from firing up safely.

Your boiler has detected that a temperature sensor is sending inconsistent data, so it has safely shut itself down to prevent potential overheating.

Your boiler is struggling to pump water through its internal system effectively, which is likely preventing it from producing heat or hot water.

Your boiler has detected that the water inside the unit is getting too hot, so it has safely shut itself down to prevent damage to your heating system.

Your boiler is shutting down because it is heating up much faster than the water can move through the system, often caused by a circulation blockage or a failing internal pump.

Your boiler has detected that the water temperature at different points inside the unit does not match up correctly, causing it to shut down to prevent damage.

Your boiler is struggling to work because the electricity supply coming from your home's wall socket or wiring is weaker than it needs to be.

Your boiler’s internal computer is experiencing a communication error or software glitch that is preventing it from operating correctly.

Your boiler's computer is experiencing an internal error and cannot operate correctly, which means you currently have no heating or hot water.

Your boiler has flagged too many faults in a short time and has now locked itself to prevent damage, meaning it will no longer operate until a professional resets the system safely.

Your boiler has switched itself off permanently because of repeated failed attempts to start, and it now requires a professional to safely unlock the system.