BoilerFaultCodesThe 6 most common faults
Your boiler is failing to start because it cannot detect a flame, meaning you have no heating or hot water.
Check if your gas supply is active by testing another gas appliance like a hob.Check for credit on your prepaid gas meter, if applicable.Press the Reset button on the boiler control panel once.Ensure the condensate drain pipe outside isn't frozen if the weather is extremely cold.
Your boiler has detected that the water pressure is too low for it to operate safely, which is usually fixed by topping up the system.
Locate the external filling loop (braided silver hose) usually found underneath the boiler.Slowly open the small valves at either end of the hose until you hear water flowing.Watch the pressure gauge and close the valves once the needle reaches between 1.0 and 1.5 bar.
Your boiler has stopped working because water is not moving through the system properly or there is too much air trapped inside.
Check that the radiator valves are openBleed all radiators to remove trapped airCheck the boiler pressure gauge and top up to 1.5 bar if lowRestart the boiler using the Reset button
Your boiler thinks a flame is burning even when it’s supposed to be turned off, which causes it to shut down as a safety precaution.
Full guide for A02Your boiler has sensed it is getting too hot and has shut itself down as a safety precaution to prevent damage.
Full guide for A03Your boiler is failing to keep a flame alight after starting up, which usually means it isn't getting enough gas or the flame isn't being detected correctly.
Full guide for A06on the Ferroli i29
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 Ferroli 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
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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