BoilerFaultCodesThe 6 most common faults
Your boiler is struggling to start up correctly or is detecting low water pressure and is currently in a temporary pause mode.
Check the pressure gauge on the front of the boiler; if it is below 1 bar, top it up to 1.5 bar using the filling loop.Restart the boiler by turning the mode selector switch to 'OFF/RESET' and then back to 'ON'.Ensure there are no obstructions in the external flue pipe (the white pipe leading outside).
Your boiler has entered a permanent lockout mode because it failed to start safely or detected a critical hardware failure.
Check that your gas pre-pay meter has credit (if applicable).Ensure your boiler pressure gauge is between 1 and 1.5 bar; top up if it is too low.Turn the mode selector dial to 'OFF/RESET' for 10 seconds, then back to the desired setting.
Your boiler has switched itself off because it has detected that the water inside has become too hot.
Check that all radiator valves are open to allow water to flow.Ensure the boiler pressure gauge is between 1 and 1.5 bar; top up if it is too low.Turn the mode selector switch to 'OFF/RESET' for a few seconds, then back to the heating/hot water icon.
Your boiler has stopped working because the water pressure is too low for the system to run safely.
Locate the filling loop (usually a silver braided hose underneath the boiler).Slowly open the valve or valves until you hear water flowing into the system.Watch the pressure gauge until it reaches between 1.0 and 1.5 bar, then close the valves tightly.
Your boiler has stopped working because it failed to light the flame or has reached an unsafe temperature.
Check that your gas meter has credit and the isolation valve is open.Turn the control knob to the 'Reset' position for a few seconds and then back to 'On'.Ensure your radiator valves are open and the system pressure is between 1 and 1.5 bar.
Your boiler is stuck in a service mode typically used by engineers, meaning it may not respond to your normal heating or hot water controls.
Full guide for YELLOW LED Solidon the Vokera Maxin
Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.
Call a Gas Safe engineer if…
- You can smell gas or see signs of a leak
- The Vokera shows an Emergency or High severity code
- The boiler keeps locking out after repeated resets
- You've tried the DIY checks and the fault hasn't cleared
- There's visible water leaking from the boiler
- The flame is yellow or orange instead of blue