Worcester Bosch Greenstar Heatslave II Fault codes & diagnostics

Your boiler's computer module does not correctly match the specific model of your boiler, preventing it from starting up properly.

Your oil-fired boiler has stopped working because the burner failed to start, which can be caused by a fuel supply issue, a blocked filter, or the boiler needing a service.

Your boiler has stopped working because it cannot light the burner, which most often happens when your oil tank is empty or there is an issue with the oil supply.

Your boiler has stopped working because it has been reset too many times while trying to clear a burner fault, and it has now locked itself for safety.

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

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

Your boiler has detected that the water inside the system is becoming dangerously hot and has shut itself down to prevent damage or overheating.

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

Your boiler has detected an electrical fault with one of its internal safety sensors, which is causing it to shut down to ensure your home remains safe.

Your boiler has detected a break in the connection to a safety sensor, so it has safely shut itself down to prevent operation while a fault is present.

Your boiler is struggling to detect the flow of water because of a faulty electronic sensor, which will prevent your heating and hot water from working correctly.

Your boiler has lost connection to the internal device that measures the flow of water, meaning it cannot confirm that water is moving through the system to provide you with heating or hot water.

Your boiler's internal computer is failing to communicate correctly, which has caused the system to stop working entirely.

Your boiler is failing to light the burner because it cannot detect a flame, meaning you currently have no heating or hot water.

Your boiler's internal computer has lost its settings or is experiencing a fault, causing it to stop operating to prevent damage.

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

Your boiler has detected an internal communication error between its internal components, causing it to shut down for safety until the electronic system can be reset.

Your boiler has detected a serious internal error and has shut itself down as a safety precaution to prevent further damage.

Your boiler has detected that the water temperature is significantly different in two areas of the system, causing it to shut down for safety.

Your boiler's computer has detected a communication failure with an internal sensor, meaning it cannot accurately monitor temperatures and has shut down for safety.

Your boiler's internal computer is experiencing a communication failure, meaning it cannot accurately read its own system sensors.

Your boiler has detected an internal electronic error that is preventing it from communicating with its own control system, meaning it will not start up.

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

Your boiler's computer module does not match the specific model of your appliance, preventing it from starting up correctly.

Your boiler has lost the ability to accurately measure the temperature of the water inside its internal store, which prevents it from heating your water correctly.

Your boiler has stopped working because the burner failed to ignite or stay lit, meaning you currently have no heating or hot water.

Your boiler has failed to ignite multiple times and has locked itself down for safety to prevent a buildup of unburnt fuel.

Your boiler is struggling to accurately measure the temperature of the water inside its internal storage tank, which means your hot water may not heat up correctly.

Your boiler has detected an internal error and is waiting for you to look at the display to reveal the specific fault code causing the problem.

Your boiler has stopped working because it failed to ignite the fuel safely, meaning you currently have no heating or hot water.

Your boiler has detected that the water is heating up unevenly inside the unit and has safely shut down to prevent damage.

Your boiler is unable to safely detect if water is moving through the system, so it has shut down to prevent potential damage.

Your boiler has encountered an internal electronic communication error that is preventing it from running safely.

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

Your boiler's control system has detected a faulty electrical connection or signs of water leakage inside the main electronic housing, causing it to shut down for safety.

Your boiler has briefly lost electrical power and is now waiting for you to manually restart it to resume normal operation.

Your boiler's computer is having trouble reading its internal sensors, which means it has safely shut down to prevent incorrect operation.