Vaillant ecoTEC Pro 30 Fault codes & diagnostics

Your boiler's internal computer is having trouble talking to its main control board, which is preventing it from starting up correctly.

Your boiler has stopped working because it has lost the connection to the sensor that monitors the temperature of the water flowing through your heating system.

Your boiler has lost the signal from the sensor that monitors the temperature of the water returning to the unit, causing it to shut down for safety.

Your boiler has stopped working because a sensor that measures the water temperature is providing an incorrect electrical signal that the system cannot understand.

Your boiler has identified a faulty electrical signal from the pipe that carries water back from your radiators, preventing it from heating your home reliably.

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

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

Your boiler has shut down because the water inside is not circulating properly, causing a significant temperature difference between the water leaving the boiler and the water returning to it.

Your boiler has switched itself off because the water inside is heating up much faster than it can circulate away, which often signals a blockage or a pump issue.

Your boiler is unable to control the flow of gas necessary to ignite the flame, so it has shut down as a safety precaution.

Your boiler has detected a signal suggesting a flame is present when it should be off, so it has shut itself down as a safety precaution to prevent a potential gas buildup.

Your boiler is trying to ignite but cannot get the flame to stay lit, so it has safely shut itself down to prevent gas from escaping.

Your boiler is trying to stay lit but keeps failing, which means it has stopped providing heating and hot water for safety reasons.

Your boiler's internal extraction fan is struggling to spin, which prevents it from safely venting exhaust gases and means your heating and hot water will not work.

Your boiler's internal communication system is not receiving the correct electrical signal, which is preventing it from operating correctly.

Your boiler has detected an issue with the internal electrical connection that controls the flow of gas, meaning it cannot safely start up.

Your boiler's computer memory has experienced an internal error, which prevents it from operating safely and reliably.

Your boiler has detected an issue with its internal computer or a wiring connection, causing it to shut down for safety.

Your boiler's main computer board is detecting that its internal components are getting too hot, so it has shut down to protect itself from potential damage.

Your boiler has detected an internal error with its computer chip or the sensor responsible for checking that the flame is lit, meaning it has shut down for safety reasons.

Your boiler is struggling to keep the internal flame burning steadily, so it has safely shut down to prevent any issues.

Your boiler's internal computer has lost its identification settings, preventing it from knowing exactly which heating unit it is.

Your boiler is confused because it is getting conflicting or stuck temperature readings, so it has stopped working to prevent potential overheating.

Your boiler is struggling because it detects a confusing difference in water temperatures between the two main internal pipes, preventing it from heating your home safely.

Your boiler is struggling to detect the water pressure inside the system because the sensor is sending an incorrect signal, which prevents the boiler from firing up safely.

Your boiler's internal computer is receiving a confusing signal about the water pressure, causing it to shut down for safety.

Your boiler is struggling to detect a rise in pressure when it turns on, which usually means it cannot confirm that water is successfully circulating through your heating system.

Your boiler is struggling to safely dispose of exhaust gases or water waste, so it has safely shut down to prevent any damage.

Your boiler has lost communication with the device that monitors your hot water temperature, causing it to stop producing hot water.

Your boiler is not detecting enough water inside the heating system to operate safely, possibly due to trapped air or a circulation problem.

Your boiler has detected that the water temperature readings at the start and end of its heating circuit do not match up properly, causing it to shut down to prevent damage.

Your boiler has detected that a temperature probe is not fitted correctly or has become loose, preventing it from accurately reading the water temperature.