BoilerFaultCodesThe 6 most common faults
Your boiler is struggling because it cannot detect enough water flowing through the system to operate safely.
Check your boiler pressure gauge; if it is below 1 bar, locate the filling loop under the boiler.Open the filling valve slowly to top up the system pressure until the gauge reads between 1 and 1.5 bar.Close the valve tightly and reset the boiler using the reset button on the control panel.
Your boiler has detected that the water pressure inside the heating system is too low to operate safely, which prevents the burners from lighting.
Locate the external filling loop, usually a small braided hose with one or two valves underneath the boiler.Gradually open the valve(s) to allow mains water into the system while watching the pressure gauge on the front display.Close the valve(s) firmly once the needle sits between 1.0 and 1.5 bar.Restart the boiler to clear the fault.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Locate the filling loop (a silver flexi-hose with one or two valves) underneath the boiler.Open the valves slowly to allow mains cold water into the system until the pressure gauge reads between 1 and 1.5 bar.Close the valves tightly and check the boiler display to see if the error has cleared.
Your boiler failed to light on its first try and needs a quick reset to attempt to restart the burner.
Locate the reset button on your boiler control panel.Press and hold the reset button for 2-3 seconds.Wait up to 60 seconds to see if the boiler ignition cycles successfully.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low to function safely.
Locate the filling loop (a silver flexi-hose) or internal filling key under the boiler.Gradually open the valve(s) to let mains water into the system until the pressure gauge reads between 1.0 and 1.5 bar.Close the valve(s) tightly and turn the boiler off and on again to clear the error.
Your boiler has failed to light the flame properly and has safely shut itself down to prevent a build-up of unburnt gas.
Full guide for L.E.D. Bon the Ariston Genus One 30
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 Ariston 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