BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working because the amount of water in your central heating system is either too low or too high.
Check the pressure gauge on the front of the boiler; if it is below 1 bar, you need to repressurise the system.Locate the filling loop (a silver braided hose with valves underneath the boiler) and open the valves slowly.Watch the gauge rise until the needle reaches the green zone (typically 1.5 bar) then ensure the valves are tightly closed.
Your boiler has stopped working because it does not have enough water inside the system to operate safely.
Locate the filling loop (a silver flexi-hose) underneath the boiler.Open the valves on the filling loop to allow cold mains water into the system.Watch the pressure gauge on the front of the boiler until the needle reaches the green zone (usually 1.5 bar).Close the valves tightly and ensure the boiler resets.
Your boiler has failed to light the flame needed to heat your water and home, so it has safely shut itself down.
Full guide for E01Your boiler has detected that it is getting too hot and has automatically switched itself off to prevent damage or safety issues.
Full guide for E02Your boiler has lost the ability to accurately measure the water temperature, so it has shut down to prevent overheating.
Full guide for E04Your boiler has stopped working because it cannot detect the flame needed to produce heat.
Full guide for E06on the Ferroli Xignal
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