BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Locate the filling loop, which is a silver braided hose with one or two valves connecting your boiler to the mains water supply.Open the valve(s) slowly to allow water into the system while watching the pressure gauge on the front of your boiler.Stop filling when the needle reaches the green zone, typically between 1 and 1.5 bar, then tightly close the valve(s).
Your boiler has stopped working because the water pressure inside the heating system has dropped too low to operate safely.
Locate the filling loop (usually a silver braided hose with one or two valves) underneath the boiler.Open the valve(s) slowly to allow water into the system until the pressure gauge on the front of the boiler reads between 1.0 and 1.5 bar.Close the valve(s) tightly and restart the boiler.
Your boiler is struggling to keep the flame lit while you are trying to use hot water, causing it to cut out during use.
Full guide for 8.4.2Your boiler is currently unable to ignite its main flame, meaning it cannot produce any hot water or heating for your home.
Full guide for 8.5Your boiler is failing to ignite its flame, which means it cannot produce any hot water or heating for your home.
Full guide for 8.1Your boiler is struggling to keep its internal ignition flame lit, which prevents the main burner from starting and means you will currently have no hot water or heating.
Full guide for 8.2on the Chaffoteaux Britony II 50FF
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 Chaffoteaux 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