BoilerFaultCodesThe 6 most common faults
Your boiler has failed to light, which means you currently have no heating or hot water because the system cannot create a flame.
Check that your gas supply is turned on and that other gas appliances in your home are working.If you have a prepaid gas meter, ensure you have active credit.Press the Reset button on the boiler control panel for 3-5 seconds to see if the system restarts.
Your boiler has stopped working because it is overheating, often due to trapped air or a lack of water moving through the system.
Check the pressure gauge and top up to 1.5 bar if it is too lowBleed all radiators to remove trapped air from the systemEnsure the central heating valves under the boiler are fully openTurn the boiler off and on again to reset the fault
Your boiler has stopped working because the water pressure is too low and needs to be topped up.
Locate the filling loop (usually a silver braided hose with small valves) underneath the boiler.Slowly open both valves until you hear water entering the system.Watch the pressure gauge and close the valves tightly once it reaches between 1 and 1.5 bar.
Your boiler has stopped itself from overheating because the water isn't moving around the system properly or there is an air pocket trapped inside.
Check that your system pressure is between 1 and 1.5 bar on the gaugeBleed your radiators to remove any trapped airEnsure all radiator valves and external isolation valves are fully openReset the boiler using the 'R' button
Your boiler has become too hot and has shut itself down as a safety precaution to prevent damage.
Check that your radiator valves are fully open to allow water to flowEnsure there is enough water pressure in the system by checking the gaugePress the Reset button on the control panel to see if the fault clears
Your boiler has shut down because it has detected that the water inside has become dangerously hot.
Check that all radiator valves are fully open to allow water to flowEnsure there is enough pressure in the system by checking the gaugePress the Reset button on the control panel to see if the fault clears
on the Ferroli iBoiler 28
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