BoilerFaultCodes.com

Worcester Bosch Greenstar 8000 Life/Style Fault Codes

CombiSystemRegular Natural GasLPG 30-50 kW 2019-present
GC Numbers: 47-108-9447-108-9547-108-9647-108-9747-108-9847-108-9947-114-1647-114-1747-114-1847-114-1947-114-2047-114-2141-611-3041-611-3141-611-3241-611-3341-611-3441-611-3541-611-3641-611-3741-611-3841-611-3944-108-4144-108-4244-108-4344-108-4444-108-4544-108-46

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Most common fault codes

1-A2
Your boiler has detected an internal communication error or a software glitch that is preventing the system from starting up safely.
Gas Safe engineer required · £120-450
1-A5
Your boiler has detected that the internal water temperature is higher than it should be, causing the system to shut down to prevent damage.
Gas Safe engineer required · £120-£280
1-b8
Your boiler is struggling to control its power level correctly, which may lead to it shutting down to prevent damage.
Gas Safe engineer required · £120-350

All 163 fault codes

Code Severity Plain English
1-A1 Low Your boiler is currently stuck in a temporary startup phase and is waiting for everything to be ready before it begins heating.
1-A2 High Your boiler has detected an internal communication error or a software glitch that is preventing the system from starting up safely.
1-A3 Low Your boiler's heating power has been manually limited to a lower setting, which might prevent your home from reaching your desired temperature properly.
1-A5 High Your boiler has detected that the internal water temperature is higher than it should be, causing the system to shut down to prevent damage.
1-A6 Low Your boiler is receiving a command from your smart thermostat or heating controller that it cannot currently process, often due to a communication glitch or a sensor reading incompatibility.
1-A7 Medium Your boiler has detected an issue with a temperature sensor normally used in more complex heating systems, often meaning a sensor is faulty or incorrectly configured.
1-b2 Low Your boiler has detected that hot water is being drawn through the system, often serving as an advisory notification rather than a breakdown.
1-b3 Medium Your boiler has detected that the hot water is getting too hot, likely due to a sensor measurement issue or a temporary building of heat in the system.
1-b4 Medium Your boiler is struggling to accurately measure the temperature of the water going to your taps, which might result in the water being too hot or too cold.
1-b7 Low Your boiler is receiving an incorrect or unusual temperature request for your hot water from the external heating controls.
1-b8 High Your boiler is struggling to control its power level correctly, which may lead to it shutting down to prevent damage.
1-C1 High Your boiler has detected that the flame has gone out or isn't burning correctly during operation, causing the system to shut down for safety.
1-C2 Medium Your boiler's internal pump is running at an incorrect speed, which could lead to your heating or hot water not working effectively.
1-C4 Low Your boiler is displaying the current outdoor temperature because an external weather sensor is connected, which is a normal status reading rather than a breakdown.
1-C6 Low Your boiler has detected that the water pressure in the system is outside of the normal operating range, which often means it needs topping up or has been overfilled.
1-d1 Low Your boiler is reporting an issue with the solar panel temperature sensor, which usually means the system is detecting an unusual reading from your solar thermal panels.
1-d2 Low Your boiler is reporting a minor sensor issue related to your solar hot water system, but it is not a breakdown of the central heating itself.
1-d3 Medium Your boiler is reporting an issue with the pump that circulates fluid between your solar panels and the water tank.
1-d4 Low Your boiler is reporting a communication problem or a technical fault with your solar heating system, though your central heating should continue to work.
1-d5 Low Your boiler is letting you know it is currently in the process of automatically topping up the water pressure in the system.
1-E1 High Your boiler's internal computer is reporting an error with its software version or internal memory communication.
1-E2 Low Your boiler's internal computer is reporting an issue with its software version, which may lead to communication problems between the controls and the boiler.
1-E3 High Your boiler's internal electronic computer chip is either missing, loose, or incompatible with the unit's software.
1-E4 High Your boiler has detected an internal software conflict or an incorrect configuration chip, preventing it from operating correctly.
1-EA High Your boiler's internal computer has identified a mismatch or issue with its software version, which prevents it from operating correctly.
1-Eb Low Your boiler's internal computer components are having trouble communicating because their software versions do not match.
200 Low Your boiler is not currently experiencing a fault; it is simply indicating that it is actively running to provide central heating for your home.
200 O Low Your boiler is working normally and is currently heating up your radiators.
201 Low Your boiler is simply letting you know that it is currently busy heating up water for your taps or shower.
201 O Low Your boiler is simply letting you know that it is currently busy heating up the water for your taps or shower.
202 Low Your boiler is temporarily resting to prevent it from turning on and off too frequently, which helps protect the internal components from unnecessary wear.
202 O Low Your boiler is taking a short, programmed break to prevent itself from turning on and off too frequently, which helps protect the internal components and improve efficiency.
203 Low Your boiler is working correctly and is simply waiting for a signal from your thermostat or timer to start heating.
203 0 Low Your boiler is working correctly but currently has no request from your thermostat or taps to provide heating or hot water.
204 High Your boiler has sensed that the water temperature has risen above the level it was set to reach, leading it to shut down for safety.
204 O High Your boiler has stopped running because the water inside it has become hotter than the temperature you have requested.
208 Low Your boiler is currently set to a manual testing mode used by engineers to check emissions, which prevents it from operating normally.
208 0 Low Your boiler is currently in a manual testing mode used by engineers to check emissions, which means it is running at a fixed output rather than following your thermostat.
214 High Your boiler has detected an issue with the air fan system and has safely shut down to prevent the appliance from starting incorrectly.
224 High Your boiler has shut down because a safety sensor has detected that it is getting far too hot, likely due to a blockage or a pump failure.
224 V High Your boiler has switched itself off because it has detected it is getting too hot, usually caused by the water pressure being too low.
227 High Your boiler is failing to light the gas even though it is trying to, which prevents your heating and hot water from working.
227 V High Your boiler is failing to light the flame properly, meaning you will not have any heating or hot water until the issue is resolved.
228 High Your boiler thinks a flame is burning even though it hasn't actually sparked or started, causing it to shut down for safety.
228 V High Your boiler thinks it can see a flame even though it hasn't started the ignition process yet, which prevents it from running for safety reasons.
229 High Your boiler started to heat up but the flame went out unexpectedly, causing the system to shut down for safety.
232 Medium Your boiler has been turned off by an external control, such as a smart thermostat, a safety switch, or a heating zone controller.
233 High Your boiler's computer has lost the ability to identify itself and requires a professional reset or part replacement.
234 High Your boiler has detected an electrical problem with the component that controls the gas supply, meaning it cannot safely light the burner to provide heat or hot water.
235 High Your boiler's internal computer parts are having trouble communicating because they don't recognise each other's software versions.
237 High Your boiler's computer has detected an internal communication error and has shut down as a safety precaution.
238 High Your boiler's internal computer has encountered a critical error and can no longer communicate with the rest of the system.
242 High Your boiler has experienced an internal electrical error that is preventing it from firing up to provide heating or hot water.
244 High Your boiler's internal computer has encountered a communication error or logic conflict, causing the system to stop working for safety.
245 High Your boiler’s internal computer has encountered a critical communication error and can no longer process instructions.
249 High Your boiler’s internal computer has encountered a communication error or internal glitch that is preventing it from running properly.
250 High Your boiler's main internal computer has encountered a communication error and needs a reset to try and clear the glitch.
251 High Your boiler's internal computer is experiencing a software or logic error, preventing it from processing information correctly.
252 High Your boiler’s internal computer has encountered a communication error or an internal glitch and cannot operate until it is reset or repaired.
253 High Your boiler's internal computer has encountered a software or hardware communication error, preventing it from starting up correctly.
254 High Your boiler's internal computer brain is experiencing a critical communication error or software glitch that is preventing it from running.
257 High Your boiler's internal computer has encountered a software or communication error and cannot operate properly.
258 High Your boiler's internal computer has encountered a software or hardware communication error and has stopped working to protect itself.
259 High Your boiler's internal computer has encountered a software or communication error and can no longer control the heating process.
262 High Your boiler's internal computer has encountered a communication error or a software fault and cannot operate correctly.
263 High Your boiler’s internal computer has encountered a software or hardware error and can no longer communicate with the rest of the system.
265 Low Your boiler is temporarily pausing because it is producing more heat than your radiators or hot water system can currently use or circulate.
268 Low Your boiler is performing a routine self-diagnostic test on its internal electrical switches and should return to normal operation shortly.
269 High Your boiler is struggling to detect a flame when it tries to start, which means it cannot fire up to provide heating or hot water.
273 Low Your boiler has paused its operation because it has been running continuously for 24 hours and needs to perform a brief internal safety check.
281 High Your boiler's internal pump is unable to move water because it is jammed or contains trapped air, stopping your heating from working.
283 Low Your boiler is currently transitioning between modes or performing a safety check while the burner gets ready to fire up.
284 High Your boiler is struggling to deliver the correct mix of air and gas required to light the burner safely.
305 Low Your boiler is temporarily pausing the hot water production to prevent itself from overheating or cycling on and off too frequently.
305 0 Low Your boiler has temporarily stopped heating water to prevent it from overheating and will automatically restart once it has cooled down.
306 Emergency Your boiler is still detecting a flame even though it has tried to shut off the gas supply, which is a safety conflict.
306 V Emergency Your boiler is still detecting a flame even after it has tried to shut off the gas, which is a safety conflict that requires a professional inspection.
357 Low Your boiler is currently running a self-cleaning sequence to remove air bubbles from the internal heating circuit, which usually happens when it is first turned on or after maintenance.
358 Low Your boiler is performing a routine self-cleaning cycle to prevent internal parts from getting stuck during periods of inactivity.
360 High Your boiler’s internal computer has encountered a memory error or is having trouble communicating with its own control board.
360 V High Your boiler's internal computer has lost communication with its identification chip or the chip installed is the wrong model for this unit.
362 High Your boiler has developed a serious internal electronic failure that means it can no longer recognize its own control system.
363 High Your boiler has encountered an internal communication error between its main electronic control boards, meaning it cannot currently function or heat your home.
604 High Your boiler has stopped working because its internal computer has detected a communication error with the burner control system.
815 Medium Your boiler is receiving incorrect temperature readings from a secondary part of your heating system, which may be preventing your home from heating up efficiently.
815 W/B High Your boiler's temperature sensors are receiving conflicting or incorrect readings, causing the system to stop working correctly to protect itself.
1010 High Your boiler's internal computer system has lost communication with its external controls or smart thermostat, meaning it cannot receive instructions to turn on.
1010 O High Your boiler's internal computer has lost its connection to its main controls, meaning it cannot receive the instructions it needs to provide heating or hot water.
1013 Medium Your boiler has reached its maximum power limit while trying to heat your water, and it has stopped for a short time to prevent overheating.
1017 High Your boiler has stopped working because the water pressure inside the system has dropped below the minimum level required to operate safely.
1017 W High Your boiler has stopped working because the water pressure is too low and needs to be topped up.
1018 Low Your boiler is simply reminding you that its scheduled annual service is now due to ensure it continues running safely and efficiently.
1019 High Your boiler's computer cannot communicate properly with the internal pump, usually because it doesn't recognize the specific model or there is a software mismatch.
1021 High Your boiler is struggling to accurately measure the temperature of your hot water, which usually means your taps aren't getting hot enough or stay cold.
1021 B High Your boiler is unable to provide hot water because it cannot accurately measure how hot the water is.
1022 B High Your boiler is unable to read the temperature of your hot water tank, which means your taps and showers may not get hot.
1023 Low Your boiler has been running for a long continuous period and needs to be reset to ensure its internal monitors can perform a safety self-check.
1025 High Your boiler's internal thermometer that measures the water returning from your radiators has developed a fault and can no longer read the temperature correctly.
1037 Low Your boiler has lost contact with its outdoor thermometer, so it is running at a pre-set steady temperature to keep your home warm while it ignores external weather changes.
1037 W Low Your boiler has lost connection with its outdoor thermometer, meaning it might not adjust its heating efficiently based on the weather outside.
1065 High Your boiler has detected an issue with the sensor that monitors internal water pressure, meaning it cannot confirm if there is enough water to operate safely.
1065 B High Your boiler's internal water pressure sensor is not communicating properly with the control board, preventing the system from operating safely.
1068 Medium Your boiler's internal sensor system is confused about the air quality or external temperature, which may hinder its efficiency or ability to run.
1068 W Low Your boiler is struggling to work out how hard it needs to fire because the sensor that monitors the weather outside has stopped sending a signal.
1070 Low Your boiler is simply reminding you that its annual service is due soon to keep it running safely and efficiently.
1071 Low Your boiler is reminding you that its annual service is now due to keep it running safely and efficiently.
1072 Low Your boiler is simply reminding you that it is time for its routine annual service to keep it running safely and efficiently.
1073 W High Your boiler has detected an electrical fault with its main temperature sensor, which means it cannot safely monitor how hot the water is and has stopped working as a precaution.
1074 W High Your boiler has lost communication with its internal thermometer, meaning it cannot safely monitor the temperature of the water circulating through your radiators.
1075 High Your boiler has stopped working because it thinks the internal heat sensor is damaged or has an electrical fault, preventing it from monitoring temperature safely.
1075 W High Your boiler has detected an electrical fault with an internal temperature sensor, preventing the system from monitoring heat levels safely.
1076 High Your boiler has stopped working because it can no longer communicate with the sensor that monitors the temperature of the main heating unit.
1076 W High Your boiler has lost communication with its internal temperature sensor, meaning it cannot monitor heat levels and has shut down as a safety precaution.
2085 High Your boiler has encountered an internal software or communication error that is preventing it from heating your home.
2908 High Your boiler's internal computer has encountered a communication error or internal electronic glitch that is preventing it from working correctly.
2910 High Your boiler is struggling to safely expel exhaust gases, which has caused the system to shut down for safety.
2914 High Your boiler's internal computer has detected a general electrical communication error and is unable to operate correctly.
2915 High Your boiler's main internal computer has encountered a memory or communication error, preventing the system from running safely.
2916 High Your boiler has detected an internal electrical communication error, meaning it cannot properly coordinate its functions to provide heat and hot water.
2920 High Your boiler has detected a problem with how it tracks its own flame, causing it to shut down for safety purposes.
2920 V High Your boiler has stopped working because it cannot confirm that the flame is properly lit, causing the system to shut down for safety.
2923 High Your boiler has detected an internal electrical communication error, which means it has stopped running to prevent damage to its electronic components.
2924 High Your boiler has detected an internal electrical problem that is preventing it from starting up safely.
2924 V High Your boiler has detected an internal electrical communication error between the control board and the gas valve, preventing the burner from lighting safely.
2925 High Your boiler has experienced an internal electrical error that has caused it to stop working for safety.
2925 V High Your boiler has stopped working because it cannot properly communicate with the internal valve that controls the gas flow.
2926 High Your boiler's internal computer has detected a general electrical communication error and has shut down as a safety precaution.
2927 B High Your boiler has lost its flame while running and has shut down for safety because it can no longer detect the fire needed to heat your water.
2928 High Your boiler's internal computer has encountered a software or hardware error that is preventing it from running properly.
2931 High Your boiler's main internal computer has encountered a processing error and cannot communicate correctly with the system.
2940 High Your boiler has detected an internal communication error or hardware fault within its main control system, preventing it from firing up safely.
2946 High Your boiler's computer memory chip is not being recognised or is mismatched, which prevents the system from starting up.
2946 V High Your boiler's internal computer chip is either missing or has failed, meaning the system doesn't know which specific model it's supposed to be.
2948 High Your boiler is struggling to stay lit when it is running at its lowest power level, often causing it to shut down for safety.
2948 B High Your boiler is struggling to keep its flame lit during operation, which is causing it to stop and restart frequently.
2949 High Your boiler is failing to detect a flame when it tries to work at a high power level, causing it to shut down for safety.
2950 High Your boiler has tried to start up but cannot detect a flame, meaning it cannot provide heating or hot water.
2950 B High Your boiler is trying to light itself but cannot detect a flame, meaning your heating and hot water will likely stop working.
2951 High Your boiler is struggling to keep its burner lit and has turned itself off for safety after several failed attempts to maintain a steady flame.
2952 High Your boiler has detected an internal error while trying to check if the flame is burning safely, causing the system to shut down for safety.
2955 High Your boiler’s internal computer has been given instructions that it doesn't recognize or that don't match how the unit is physically built.
2956 Low Your boiler has detected that a specific accessory or additional part has been connected and needs to be set up through the control panel.
2957 High Your boiler has detected an internal electrical communication error, which means it has stopped working as a safety precaution.
2961 High Your boiler has stopped working because the internal computer cannot communicate with the fan that safely clears away exhaust fumes.
2962 High Your boiler has stopped working because the internal computer cannot communicate with the fan that safely clears away used gases.
2963 High Your boiler has detected that the sensors monitoring its internal temperature are giving incorrect readings or have failed, causing the system to shut down for safety.
2963 B High Your boiler has detected an unusual temperature reading because a sensor or its wiring is not communicating correctly with the main control unit.
2964 B High Your boiler has detected that water is not moving through its internal heating unit fast enough, which can cause the system to overheat and shut down.
2965 High Your boiler has sensed that the water inside is getting much hotter than it should be and has shut down as a safety precaution.
2965 B High Your boiler has shut down because the water inside is getting much hotter than it should be, which is often caused by a blockage or a pump failure preventing the heat from moving away.
2966 High Your boiler is overheating too quickly because water isn't moving through the system fast enough.
2966 B High Your boiler is heating up too quickly and has shut down to prevent damage, usually because water isn't flowing through the system fast enough.
2967 B High Your boiler has detected that water is heating up too quickly or unevenly, causing it to shut down for safety to prevent overheating.
2968 Low Your boiler has detected that the water pressure is too low and it is currently trying to top itself up automatically.
2969 High Your boiler's automatic filling system has topped up the water pressure too many times in a short period, suggesting there may be a leak in your heating system.
2970 High Your boiler has detected that the water pressure in your heating system is falling much faster than normal, which usually indicates a significant leak or a fault with the pressure sensor.
2970 B High Your boiler has detected that the water pressure in your radiators is falling much faster than expected, which could indicate a significant leak.
2971 High Your boiler has detected that the water pressure in the system has dropped below the minimum level required to operate safely.
2971 B High Your boiler has detected that the water pressure in your heating system is too low to operate safely and effectively.
2972 High Your boiler has detected that the electricity supply coming from your home's mains or the local grid is too low for it to operate safely.
A-A5 High Your boiler has detected that the water temperature has risen too quickly or reached an unusually high level, causing it to shut down to prevent overheating.
A-b2 Low Your boiler has detected an issue with how quickly hot water is moving through the system, which may result in inconsistent water temperatures.
A-b4 Medium Your boiler has detected an issue with the sensor that monitors the temperature of the hot water leaving the unit, which may result in inconsistent water temperatures.

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