BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.
Locate the filling loop (usually a silver flexible hose) underneath the boiler.Slowly open the valve(s) to allow water into the system while watching the pressure gauge.Close the valve(s) tightly once the pressure reaches between 1.0 and 1.5 bar.
Your boiler is failing to light the gas burner after several attempts, meaning you will not have any heating or hot water until the issue is resolved.
Check that your gas emergency control valve is in the 'on' positionIf you have a prepay gas meter, check that you have sufficient creditTry to reset the boiler by pressing the reset button for 5 secondsCheck if other gas appliances in your home, like a hob, are working correctly
Your boiler has failed to light after several attempts and has locked itself out for safety.
Check that your gas emergency control valve is open and you have credit on your gas meterCheck if other gas appliances in your home, such as a hob, are working correctlyPress the Reset button on the boiler control panel to attempt a restart
Your boiler has switched itself off to prevent damage because its internal components have become too hot.
Check that all radiator valves are fully openEnsure your system water pressure is between 1 and 1.5 barPress and hold the Reset button for 5 seconds to clear the lockout
Your boiler has stopped working because water is not moving through the system properly to keep the internal parts cool.
Check that your boiler pressure gauge is between 1 and 1.5 barOpen all radiator valves fully to ensure water can flowBleed your radiators to remove any trapped air pockets
Your boiler has stopped working because the water pressure is too low for it to operate safely.
Locate the filling loop (the flexible silver hose) underneath the boiler.Slowly open the one or two taps on the loop until you hear water moving.Watch the pressure gauge and close the taps once it reaches between 1 and 1.5 bar.
on the Ariston Egis 24 MFFI
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