Viessmann Vitodens 100-W Fault codes & diagnostics

Your boiler has shut down because the electrical power coming into it is too weak or unstable to run safely.

Your boiler has stopped working because it is unable to accurately measure the temperature of the water inside the system.

Your boiler has lost the connection to the sensor that measures the water temperature, so it has shut down as a precaution to prevent overheating.

Your boiler has stopped working because a temperature monitoring sensor is sending an incorrect signal, causing the system to shut down for safety.

Your boiler has switched itself off because it has lost the electronic connection to a temperature sensor, preventing it from safely monitoring its own heat level.

Your boiler has stopped heating your water because it is receiving an incorrect signal from the temperature sensor inside your water cylinder.

Your boiler has stopped working because the connection between the water tank sensor and the control system has been disrupted.

Your boiler has stopped heating your hot water tank because it is receiving an incorrect signal from the temperature sensor.

Your boiler has stopped heating your tap water because it is getting a faulty signal from the sensor that measures the water temperature.

Your boiler has stopped producing hot water because a sensor inside is giving an incorrect reading, likely due to a loose wire or a faulty component.

Your boiler has detected a fault with the sensor that monitors the water temperature returning to the unit, causing it to stop running for safety and efficiency.

Your boiler has lost its connection to the sensor that measures the water temperature coming back into the unit, which often results in the system shutting down for safety.

Your boiler has stopped working because the water pressure inside the system is too low to operate safely.

Your boiler has switched itself off because a sensor inside detects that the exhaust system or internal temperature isn't configured exactly as it should be.

Your boiler has detected an internal electronic error and has safely shut itself down to prevent further issues.

Your boiler has detected a faulty temperature reading in the exhaust system and has shut itself down for safety reasons.

Your boiler's electronic command center is having trouble talking to its main internal brain, which means the system has safely shut down to prevent incorrect operation.

Your boiler's main electronic brain has encountered a internal software error, meaning it has safely shut itself down to prevent any further issues.

Your boiler has stopped working because it cannot correctly identify the internal key used to manage its settings.

Your boiler has stopped working because a sensor that monitors the temperature of the exhaust gases has lost its electrical connection, causing the system to shut down for safety.

Your boiler's fan or airflow system is failing to start up properly, which means the unit is preventing itself from igniting to stay safe.

Your boiler has detected an issue with the sensor that manages airflow during the burning process, causing it to shut down for safety.

Your boiler has shut down because an external safety device, such as a thermostat or water pressure switch, has detected a potential issue and stopped the burner from firing.

Your boiler is not lighting properly and has locked itself out for safety, which means you currently have no heating or hot water.

Your boiler has switched itself off because it has reached a temperature that is too high, often caused by a blockage or a pump issue.

Your boiler has detected a safety interruption in its internal system and has shut down to prevent any unsafe operation.

Your boiler has shut down because a safety sensor detected that the exhaust gases are too hot or are not escaping correctly.

Your boiler has detected an electrical problem with its power supply that is preventing it from safely lighting the flame.

Your boiler has detected a flame when there shouldn't be one, which stops it from starting up for safety reasons.

Your boiler has detected an internal electronic malfunction and has safely shut itself down to prevent further issues.

Your boiler is unable to start because it cannot confirm that the fan is moving air safely through the system.

Your boiler has stopped working because the water pressure inside the heating system has dropped too low.

Your boiler is unable to start up safely because it cannot confirm that the fan is moving air through the system correctly.

Your boiler is unable to light because the internal fan isn't spinning fast enough to clear the system or provide the correct air flow.

Your boiler is unable to light because the internal fan is spinning too quickly for the system to safely start the ignition process.

Your boiler has stopped working because the internal computer can no longer talk to or control the fan that helps clear exhaust gases.

Your boiler's internal computer has encountered a software or setting error and can no longer communicate correctly with the system.

Your boiler has stopped working because its internal computer board has detected a serious electronic error.

Your boiler's main control computer and the front display screen have stopped talking to each other, meaning the unit cannot function.

Your boiler has stopped heating because it is unable to accurately measure the water temperature flowing through the pipes.

Your boiler has stopped working because it cannot communicate with the sensor that monitors the temperature of your hot water cylinder.

Your boiler is struggling to start because it cannot get a correct temperature reading from the sensor located on the outside of your house.

Your boiler has stopped heating because a safety sensor that monitors exhaust gases has detected an electrical fault.

Your boiler has detected an internal electronic malfunction and has shut itself down as a safety precaution, meaning you currently have no heating or hot water.

Your boiler has detected that the exhaust gases are becoming too hot, so it has safely shut itself down to prevent any damage.

Your boiler has switched itself off because it has detected that it is running too hot and needs a professional to check it is venting heat correctly.

Your boiler is failing to ignite the flame needed to produce heat and hot water, so it has shut down as a safety precaution.

Your boiler has detected an issue with the sensors that ensure air is moving correctly, so it has safely shut itself down to prevent unsafe operation.

Your boiler is failing to start because it cannot detect that the internal fan, which clears exhaust gases, is spinning correctly.

Your boiler has detected an issue with the sensors that monitor the airflow, so it has safely shut down to prevent it from operating incorrectly.

Your boiler is failing to start because it cannot detect enough airflow to safely ignite the flame.

Your boiler has detected that the internal exhaust fan is not switching off correctly when it should, which is a safety mechanism to prevent the boiler from starting under unsafe conditions.

Your boiler has detected an internal electronic error and has safely shut itself down to prevent operation while it is malfunctioning.

Your boiler's electronic control system has detected a critical internal error, which means it has safely shut down to prevent damage and will not provide heating or hot water.

Your boiler has detected trapped air inside, which is preventing it from starting up safely.