Vaillant Ecomax Condensing 600/800 series Fault codes & diagnostics

Your boiler is currently running its internal pump to move leftover heat away from the system, which is a normal process and usually not a fault unless it stays on constantly.

Your boiler is currently in a brief, normal safety pause to prevent it from switching on and off too frequently.

Your boiler is currently reporting its internal temperature target, which is a status message rather than a breakdown.

Your boiler is currently displaying its warm water preset status rather than an active fault, indicating your hot water pre-heating feature is enabled.

Your boiler is operating normally and is simply confirming that it has received a signal from your thermostat or timer to start heating your home.

Your boiler has received a request to heat your hot water and is operating exactly as it should to fulfill that demand.

Your boiler is currently indicating that it is switching between its summer and winter operational modes based on the position of the control dial.

Your boiler is simply reporting the current speed at which the internal air fan is spinning, rather than indicating a fault.

This code is simply a status message from your boiler showing you the current temperature of the water flowing through your heating system, rather than an error or a fault.

Your boiler is simply displaying the current temperature of the water returning to the system, which is a status readout rather than a fault.

Your boiler is struggling to communicate with its outdoor weather sensor, so it is currently ignoring local temperature readings and defaulting to standard operations.

Your boiler is simply displaying the current temperature reading from the weather sensor installed outside your home.

Your boiler is perfectly fine; it is currently taking a mandatory short break to prevent the system from overheating and will automatically restart on its own.

Your boiler is correctly performing a routine check to ensure the water inside is being circulated and heated properly for your hot water supply.

Your boiler is struggling to accurately read or maintain the temperature for its quick-start hot water function or solar heating setup.

This is not an error code, but simply a display showing the total number of hours your boiler has spent running since it was installed.

This code is simply a counter displaying how many times your boiler has turned its heating cycle on and off; it is not an error message and does not indicate a fault.

Your boiler is currently in standby mode because it is not receiving a request for heat from your thermostat or hot water timer.

Your boiler is currently working normally and simply letting you know that the internal pump is moving water around your heating system.

Your boiler is currently preparing to ignite and is circulating water through the system, which is a normal part of the startup sequence.

Your boiler is currently just starting up to prepare for heating; this is a normal status message rather than a fault.

Your boiler is operating normally and has successfully ignited to provide heating to your home.

Your boiler is simply running its internal cooling fan for a short time after your heating has turned off to clear any remaining heat from the system.

Your boiler is currently running its internal pump to safely move leftover heat away from the main unit after your heating has finished.

Your boiler is correctly responding to a request to heat your domestic hot water and is operating normally.

Your boiler is currently operating normally to heat your hot water, so it is simply showing you what stage of the heating cycle it is in.

Your boiler is currently working as it should and is in the process of lighting the flame to heat your water.

Your boiler is currently operating normally as it heats water for your taps or shower.

Your boiler is simply running its internal cooling fan for a few moments after finishing a hot water cycle to move excess heat away from the system.

Your boiler is currently performing a routine task to keep the water inside it pre-heated so that your hot water taps run warm more quickly.

Your boiler is simply performing a routine check to ensure it is ready to provide hot water quickly, so there is no fault with your system.

Your boiler is currently just going through its normal process of starting up to prepare your hot water.

Your boiler is operating normally and is currently heating up its internal water store to ensure you have hot water available quickly.

Your boiler is currently running its cooling fan to clear out waste gases after you have finished using hot water, which is a normal part of the shutdown process.

Your boiler is currently just finishing a routine cycle to circulate leftover warm water through your pipes, which is a normal part of its operation.

Your boiler is perfectly fine and is simply taking a short break between heating cycles to prevent unnecessary wear and save energy.

Your boiler is currently in standby mode because it is not receiving a signal from your thermostat or timer to turn on the heating.

Your boiler is currently pausing before starting up because it is waiting for the air extraction system to safely prepare for operation.

Your boiler has detected that the temperature is low and is temporarily running its internal pump to prevent the water inside from freezing.

Your boiler is currently in standby mode because it is not receiving a signal from your thermostat or timer to turn on the heating.

Your boiler is currently pausing to allow the internal exhaust fan to settle down before it attempts to ignite the flame.