72 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
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The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.
| GC number | Appliance (register name) | Produced |
|---|---|---|
| 47-819-15 | Vitodens 222F FS2B 19kW Combi with Store | 2009–2012 |
| 47-819-16 | Vitodens 222F FS2B 26kW Combi with Store | 2009–2012 |
| 47-819-17 | Vitodens 222F FS2B 35kW Combi with Store | 2009–2012 |
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Your boiler has detected an issue with the gas pressure or a component failure and has shut down as a safety precaution.
Your boiler has shut down because it is struggling to discharge exhaust fumes safely or is detecting a significant lack of air flow.
Your boiler has stopped working because the burner isn't lighting correctly, likely due to a problem with the internal airflow or the ignition system.
Your boiler has detected a sequence of ignition or flame detection errors and has shut itself down for safety.
Your boiler has detected a sequence of ignition or flame detection errors and has shut itself down for safety.
Your boiler has lost communication with one of its internal heat sensors, meaning it cannot monitor temperatures accurately to operate safely.
Your boiler is unable to read the temperature of your hot water cylinder because the connection to the sensor has been lost or damaged.
Your boiler has lost communication with the solar heating control panel, meaning your solar panels won't be helping to heat your water.
Your boiler is struggling to accurately gauge the weather outside, meaning it might not provide the right amount of heat for your home.
Your boiler's computer is currently unable to communicate with its internal control settings, which prevents it from operating or being adjusted correctly.
Your boiler has lost its connection to the outside temperature sensor, meaning it cannot automatically adjust your heating based on the weather.
Your boiler has detected an electrical fault with a sensor that monitors the water temperature flowing into your heating system, leading it to shut down for safety.
Your boiler has lost connection with a temperature sensor that monitors the main water flow, likely due to a broken wire or a faulty sensor.
Your boiler has stopped heating because a internal sensor that monitors water temperature has developed an electrical fault and is preventing the burner from firing.
Your boiler has failed to ignite or stay lit, meaning your heating and hot water have stopped working.
Your boiler has stopped working because it can no longer accurately measure the temperature of the water inside the system.
Your boiler has stopped working because it thinks the hot water tank is dangerously overheating due to a faulty electrical sensor.
Your boiler is having trouble controlling the temperature for one of your heating zones, likely due to a faulty sensor reading.
Your boiler has stopped providing hot water because the internal sensor that measures water temperature has detected a technical fault or a short circuit.
Your boiler has stopped working because a sensor that monitors the water temperature has developed an electrical fault.
Your boiler has stopped providing hot water because the internal sensor that measures water temperature is broken or disconnected.
Your boiler has stopped working because it cannot accurately measure the temperature of the water leaving the unit, usually due to a fault in a sensor or its wiring.
Your solar heating system has a faulty sensor or a wiring problem that is preventing it from correctly monitoring the temperature of the roof panels.
Your boiler has detected a technical fault with a sensor in your solar heating system, which may affect its ability to heat your water using solar energy.
Your boiler has lost communication with the temperature sensor in your hot water tank because of an electrical fault, meaning it cannot accurately monitor your solar heated water.
Your boiler has sensed that the internal pump is malfunctioning or water is not circulating correctly, which has caused the system to stop as a safety precaution.
Your boiler has detected that the water pump is likely stuck or not moving water correctly, which means the system cannot heat up safely.
Your boiler has reverted to its original factory settings and needs to be reconfigured by a professional to match your home's specific heating system requirements.
Your boiler has detected an issue with the air or exhaust flow and is currently running a self-cleaning vent cycle to clear it.
Your boiler has detected that the water pump which moves heat around your home is stuck or unable to spin freely, causing the heating system to stop working.
Your boiler has detected an electrical fault with the sensor that monitors the temperature of the exhaust gases, causing the system to shut down for safety.
Your boiler's main control panel is having trouble talking to its own internal computer, meaning you cannot change settings or control the heating properly.
Your boiler has lost the connection to its outdoor temperature sensor and is assuming a fixed temperature of 0°C to keep your heating running safely.
Your boiler has experienced an internal communication error or processor glitch that is preventing it from running properly.
Your boiler's internal computer chip has been disconnected or has developed a communication fault, meaning the system doesn't know which settings to use.
Your boiler has detected a broken connection or a fault with the sensor that monitors the temperature of the exhaust gases, causing the system to stop working for safety.
Your boiler has identified that the heating circuit for a specific zone, such as an underfloor heating loop, is limited to a low temperature to protect your system from overheating.
Your boiler has lost its connection with the remote control unit used to manage your primary heating circuit.
Your boiler has lost connection with the remote control unit that manages your second heating zone, meaning you cannot adjust the temperature for that specific area.
Your boiler is having trouble communicating with the wall-mounted thermostat control because of a setup or configuration error.
Your boiler is having trouble communicating with an internal connection module, which means it cannot properly coordinate its heating and hot water functions.
Your boiler is having trouble 'talking' to your solar panels or an additional heating control part, which might prevent those specific systems from working correctly.
Your boiler is struggling to talk to its external controls or internal smart settings, which means it doesn't know when to turn on or off.
Your boiler is having trouble communicating with its internal pump, which means it cannot properly move heated water around your system.
Your boiler is having trouble communicating with the internal pump that moves hot water around your heating system.
Your boiler is having trouble communicating with the internal pump that moves hot water through your radiators, which may prevent your heating from working correctly.
Your boiler has lost its connection to the remote control or internet monitoring system, so you may not be able to adjust settings via your app or external thermostat.
Your boiler is having trouble communicating with an add-on control or an external smart home accessory, which may affect its ability to run efficiently.
Your boiler is having trouble 'talking' to its internal Wi-Fi or internet connection module, which may prevent you from controlling it via apps or external thermostats.
Your boiler has lost its connection to the indoor temperature sensor for your main heating area, meaning it cannot accurately tell how warm your rooms are.
Your boiler is currently operating on a fixed schedule and is not using your room thermostat to adjust its temperature automatically.
Your boiler is currently operating on a fixed schedule and is ignoring temperature adjustments from your room thermostat or smart controller.
Your boiler has stopped working because it is not receiving the correct electrical power or an internal fuse has blown.
Your boiler has stopped working because it cannot confirm that a flame is burning safely, leading to a complete shutdown for your protection.
Your boiler has stopped working because it cannot detect a stable flame inside the burner.
Your boiler has detected an issue while checking its internal systems and has locked itself out to prevent unsafe operation.
Your boiler has failed to start because it cannot detect that the gas is burning correctly, causing it to shut down for safety.
Your boiler has detected an internal issue and has safely shut itself down to prevent further problems.
Your boiler has detected an issue with how it combusts gas and has safely stopped running to prevent any performance problems.
Your boiler has detected an internal electronic error and has safely shut itself down to prevent further issues.
Your boiler has experienced a serious internal brain failure and the main control board likely needs to be replaced.
Your boiler has switched itself off because it has reached a dangerously high temperature, likely due to a lack of water or poor circulation.
Your boiler has shut down because it has detected it is getting too hot, which is usually caused by a lack of water or a circulation problem.
Your boiler is detecting a flame when there shouldn't be one, so it has shut down for safety purposes to prevent a malfunction.
Your boiler has failed to light the flame, which means it cannot provide any heating or hot water until the issue is resolved.
Your boiler has stopped working because it cannot correctly detect the water pressure, causing the system to shut down for safety.
Your boiler has detected a problem with the gas valve not closing correctly, so it has shut down the burner for safety.
Your boiler has stopped working because the internal fan isn't spinning fast enough to safely start the heating process.
Your boiler has failed to start properly and the fan is running constantly to clear out the system, preventing the heater from firing up.
Your boiler has detected a serious problem related to the fuel supply or exhaust system, causing it to shut down for your safety.
Your boiler's internal computer has crashed due to an ignition failure or electrical interference, preventing it from starting the burner.
Your boiler's internal computer has encountered a critical error or is having trouble communicating with its electronic security card, causing the system to shut down for safety.
Not faults — these are normal operating states. Tap to expand.
BoilerFaultCodes