BoilerFaultCodesVaillant ecoTEC pro 28 VUW 286/5-3 R6 Fault codes & diagnostics
0 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Combi Natural Gas 2017-present
GC Number 47-044-89
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Status & diagnostic codes 73 operating states & engineer diagnostics
Not faults — these are normal operating states. Tap to expand.
73 operating states & engineer diagnostics
Not faults — these are normal operating states. Tap to expand.
D.000 Diagnostic This code indicates your boiler is currently running at a reduced heating power level, which is a normal operational status rather than a fault. D.001 Diagnostic Your boiler is currently just running its internal water pump to circulate leftover heat, which is a normal part of the system's cooling process. D.002 Diagnostic This is a temporary pause where the boiler rests for a few minutes to prevent any unnecessary wear and tear from switching the burner on and off too frequently. D.003 Diagnostic Your boiler is simply reporting the current temperature of the water inside the unit, which is a normal status reading rather than an active fault. D.004 Diagnostic Your boiler is struggling to accurately measure the temperature of the water stored in your hot water cylinder. D.005 Diagnostic Your boiler is simply displaying the current temperature setting for the water flowing through your heating system, rather than indicating a fault. D.006 Diagnostic Your boiler is currently reporting its internal temperature goal, which is a normal part of its operating process rather than a breakdown. D.007 Diagnostic Your boiler is displaying a status message indicating the target temperature settings for your hot water or heating are currently being communicated to the internal system. D.008 Diagnostic Your boiler's control system is struggling to communicate with an external device, such as your room thermostat or timer. D.009 Diagnostic Your boiler is struggling to communicate with its internal control system or an external thermostat, which is preventing it from heating your home properly. D.010 Diagnostic Your boiler is having trouble circulating water because the internal pump responsible for moving heat around your home is reporting a fault. D.011 Diagnostic Your boiler is struggling to detect or communicate with the external water pump responsible for moving heat around your home. D.012 Diagnostic Your boiler is struggling to pump water to your hot water tank or internal heat store, which means you may experience a lack of hot water. D.013 Diagnostic Your boiler is struggling to move water through your heating system, which means your radiators or hot water taps may stop working correctly. D.014 Diagnostic This is a technical setting that controls how fast your boiler's internal pump circulates water throughout your heating system. D.015 Diagnostic Your boiler is struggling to confirm that the internal water pump is spinning at the speed required to circulate heat around your home. D.016 Diagnostic Your boiler's internal computer is having trouble communicating with the heating controls, which means the system may stop heating your home temporarily. D.017 Diagnostic Your boiler is currently unable to communicate correctly with your heating controls, meaning it does not know whether to turn your heating on or off. D.018 Diagnostic Your boiler is simply indicating that the water pump is currently running to move heat around your radiators. D.019 Diagnostic This code is simply an information display confirming that your boiler's internal water pump is currently running at its second speed setting. D.020 Diagnostic Your boiler is currently set to an abnormally high hot water temperature limit, which usually indicates that the system is simply waiting for a sensor to signal that the water is hot enough. D.022 Diagnostic Your boiler is simply showing that it has received a request to heat your hot water and is currently working to supply it. D.023 Diagnostic Your boiler is currently performing a routine check to ensure there is enough water flowing through the heating system. D.025 Diagnostic Your boiler is currently communicating with your hot water tank to heat up the water supply, and this is a normal operating status rather than a fault. D.026 Diagnostic Your boiler's internal control system is having trouble communicating with an add-on device, such as an external pump or a specific heating control component. D.027 Diagnostic Your boiler is having trouble communicating with an add-on device, such as an external pump or a specific smart controller connected to your system. D.028 Diagnostic Your boiler's internal control system is having trouble communicating with an external add-on, such as an additional pump or a connected zone valve. D.029 Diagnostic Your boiler is struggling to detect enough water flowing through the system to heat your home safely. D.033 Diagnostic Your boiler is struggling to get the air flowing correctly for safe operation and has paused itself to prevent any issues. D.034 Diagnostic Your boiler is struggling to detect the speed of the internal fan, which is essential for safely removing exhaust gases. D.035 Diagnostic Your boiler is struggling to switch between heating your radiators and heating your hot water because an internal diverter component is stuck. D.036 Diagnostic Your boiler is struggling to detect the flow of water through your taps, which means it may fail to heat your water properly when you turn on a hot tap. D.039 Diagnostic Your boiler is struggling to read the temperature from your solar water heating system, meaning it cannot accurately tell if your stored solar water is hot enough to use. D.040 Diagnostic Your boiler is simply reporting the current temperature of the water flowing through your heating system, which is a normal part of its internal monitoring process. D.041 Diagnostic Your boiler is struggling to read the temperature of the water returning to it, meaning it cannot accurately judge how much heat to provide. D.044 Diagnostic Your boiler is struggling to detect the flame properly, which means it cannot safely sustain its burner, leading to a loss of heating and hot water. D.046 Diagnostic Your boiler is currently running a background check to confirm the internal pump is circulating water correctly throughout your heating system. D.047 Diagnostic Your boiler is simply displaying the current outdoor temperature and is functioning normally as part of its weather-compensation system. D.050 Diagnostic Your boiler is struggling to calibrate its fan speed correctly, which is preventing it from firing up reliably. D.051 Diagnostic Your boiler's fan is struggling to run at the correct speed to ensure safe operation, causing the system to stop working to protect itself. D.058 Diagnostic Your boiler is currently waiting for a signal from your solar thermal system to decide if it needs to top up your hot water temperature. D.060 Diagnostic Your boiler has automatically shut itself down several times to prevent overheating, suggesting there is a persistent problem with how it manages its internal temperature. D.061 Diagnostic Your boiler has repeatedly failed to light its burner successfully, so it has locked itself out to prevent any safety issues. D.064 Diagnostic Your boiler is struggling to light reliably, taking longer than it should to ignite the flame each time you turn on your heating or hot water. D.065 Diagnostic Your boiler has failed to light the flame after several attempts, meaning it is currently unable to provide heating or hot water. D.067 Diagnostic Your boiler is currently in a temporary cooling-down period and will restart heating automatically once this short break is over. D.068 Diagnostic Your boiler has struggled to light on its first attempt and is tracking how many times this has occurred. D.069 Diagnostic Your boiler is struggling to start and has needed multiple attempts to get the flame going, which suggests a minor recurring issue with ignition. D.070 Diagnostic Your boiler is struggling to switch between heating your radiators and heating your hot water because an internal diverter component is stuck. D.071 Diagnostic Your boiler has detected that the water temperature is higher than the maximum safety limit it is allowed to reach. D.072 Diagnostic Your boiler is simply finishing the process of moving hot water to your cylinder and is not actually indicating a fault. D.073 Diagnostic Your boiler is displaying a status message indicating that the internal temperature settings for your hot water comfort mode have been adjusted from their factory default. D.074 Diagnostic Your boiler is currently performing a routine high-temperature cycle to kill off any potential bacteria in your hot water storage tank. D.075 Diagnostic Your boiler is struggling to heat your hot water cylinder within the allowed time limit, likely due to a sensor error or a blockage in the water system. D.076 Diagnostic Your boiler's electronic brain is having trouble identifying the specific model type it is installed in, which is preventing it from starting up correctly. D.077 Diagnostic Your boiler is currently set to use a restricted amount of power when heating your hot water, which may cause your taps or shower to take longer to heat up than usual. D.078 Diagnostic Your boiler has detected that the water being used for your hot taps is reaching a higher temperature than it should be, so it is temporarily limiting itself to prevent overheating. D.080 Diagnostic This code is simply an information message displaying the total number of hours your boiler has been running for heating, and it does not indicate a fault. D.081 Diagnostic This code is simply an information display showing the total number of hours your boiler has been providing hot water, rather than a sign of a fault. D.082 Diagnostic Your boiler is simply performing a routine check of its heating system and is functioning exactly as it should. D.083 Diagnostic Your boiler is currently operating normally as it fires up to heat your tap water. D.084 Diagnostic This is a scheduled service reminder notification showing that your boiler is due for its routine professional maintenance check. D.088 Diagnostic Your boiler is struggling to detect enough water flowing through the system to heat your taps, which usually means the sensor is blocked or faulty. D.090 Diagnostic Your boiler is having trouble communicating with the digital controls or external thermostats attached to it, which may prevent your heating from turning on properly. D.091 Diagnostic Your boiler is currently trying to synchronize its internal clock with a radio signal from a time transmitter, but it is failing to receive a strong enough connection. D.092 Diagnostic Your boiler is having trouble communicating with the internal hot water storage tank, which may affect your hot water supply. D.093 Diagnostic Your boiler's internal computer settings have not been configured correctly to match the specific model, meaning it does not know how to operate properly. D.094 Diagnostic Your boiler has successfully completed a routine task to delete its saved record of past issues. D.095 Diagnostic This code is simply an information message indicating the current software version of your boiler's internal communication system and does not signal a fault. D.096 Diagnostic Your boiler has reverted to its original factory configuration, which means your personal settings and heating schedules have been erased. S.04 Status Your boiler is currently working as it should and is providing heat to your radiators. S.14 Status Your boiler is working normally and is currently firing up to provide hot water to your taps or shower. S.31 Status Your boiler is perfectly healthy but is currently set to summer mode, meaning it is only providing hot water and has paused the central heating.
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