Worcester Bosch Greenstar 30Si Compact ErP Fault codes & diagnostics

Your boiler has detected that it is getting too hot too often and has locked itself down as a safety precaution to prevent damage.

Your boiler has detected an internal control communication issue and has temporarily shut down for safety.

Your boiler's main control unit has encountered a communication error and is unable to operate safely.

Your boiler has detected that the water inside is heating up far too quickly, so it has safely shut itself down to prevent damage.

Your boiler has safely shut down because the internal burner flame unexpectedly went out while trying to heat your home.

Your boiler has temporarily stopped working because it cannot properly read the temperature of the water returning to it.

Your boiler has successfully lit the flame, but the water inside is not heating up as expected.

Your boiler is failing to start safely because it is struggling to time its spark and gas supply correctly.

Your boiler has temporarily shut down because the internal water temperature has gotten too hot, likely due to a temporary blockage in water flow.

Your boiler has temporarily stopped working because it cannot properly read one of its internal temperature sensors.

Your boiler has temporarily stopped working because the water returning back into it has become dangerously hot.

Your boiler's main computer control panel has detected an internal communication failure and has locked itself down for safety.

Your boiler has temporarily locked out because it has started up repeatedly without successfully staying on, which is usually a safety precaution to prevent damage.

Your boiler is struggling to circulate water, likely because the internal pump is jammed or there is air trapped inside the system.

Your boiler has detected an issue with the sensor that monitors exhaust gases, so it has safely shut down to prevent incorrect operation.

Your boiler has lost its connection to your thermostat or remote heating controller, meaning it cannot receive instructions to turn the heating on.

Your boiler's computer has detected a serious internal fault that prevents it from operating safely, requiring a qualified professional to inspect or replace the electronic control system.

Your boiler's internal fan isn't spinning fast enough to safely clear away exhaust fumes, causing the system to shut down for your protection.

Your boiler has detected an issue with its internal airflow system that may have caused it to shut down for safety.

Your boiler’s internal fan is not spinning fast enough to safely clear away exhaust fumes, which has caused the system to shut down for safety.

Your boiler has stopped working because the internal component responsible for pushing air through the system is failing to start.

Your boiler is temporarily locked out because it cannot detect water movement or pressure change when the internal pump starts up.

Your boiler is temporarily locked out because it cannot read the internal water pressure correctly, meaning you currently have no heating or hot water.

Your boiler has lost its connection to an essential safety internal plug, meaning it currently cannot communicate correctly with its control system.

Your boiler has detected that the water inside is heating up unevenly, so it has safely shut down to prevent any damage.

Your boiler has detected a faulty internal temperature sensor, which means it cannot accurately monitor the water temperature and has shut down as a safety precaution.

Your boiler has detected that hot water is flowing in the wrong direction or circulating incorrectly, meaning it cannot heat your home properly.

Your boiler is having trouble 'reading' the temperature of the incoming water, which is causing it to stop operating correctly to prevent a potential error.

Your boiler has detected that the water inside the system is getting much hotter than it should be, so it has shut itself down to prevent damage.

Your boiler has shut down because it has detected that the water inside is Getting too hot, which is a safety feature to prevent damage.

Your boiler is failing to light the gas or stay lit, which has caused it to shut down for safety.

Your boiler has detected that the exhaust gases are getting too hot, too quickly, so it has turned itself off to prevent internal damage.

Your boiler has temporarily stopped because the hot water inside the system has become much hotter than it should be.

Your boiler has detected that the water inside isn't warming up as expected after it fires up, so it has stopped trying to prevent potential damage.

Your boiler's internal computer has encountered a critical electronic software or hardware error that is preventing it from running safely.

Your boiler thinks it can see a flame inside the system even though it should be turned off, which is a safety conflict that prevents it from starting up.

Your boiler has detected that the water pump is not running as expected, which prevents heat from circulating through your home.