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 connecting two pipes underneath the boiler.Open the valves at both ends of the hose to allow mains water to enter the system until the pressure gauge reads 1.5 bar.Close both valves tightly and remove the hose if required by your specific installation.
Your boiler has detected that the water pressure inside the system has dropped too low for it to operate safely, meaning your heating and hot water will not turn on.
Locate the filling loop, which is usually a flexible silver hose with one or two small valves connecting your boiler or nearby pipework.Open the valve(s) slowly to allow mains 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 check that the fault light has cleared.
Your boiler has stopped working because the amount of water inside your heating system has dropped below the required level.
Locate the external filling loop, which is a flexible braided hose connecting your central heating pipework to your mains water pipe.Open the small valves at both ends of this hose slowly to allow water to enter the system while watching the pressure gauge on the front of the boiler.Close both valves firmly once the needle sits between 1.0 and 1.5 bar.
Your boiler has stopped working because the water pressure inside your heating system has dropped too low to operate safely.
Locate the filling loop (a silver braided hose) underneath the boilerOpen the small valve or tap attached to the hose slowlyWatch the pressure gauge on the front of the boiler until the needle reaches between 1 and 1.5 barClose the valve tightly to stop the flow of water
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Locate the filling loop (a flexible metal hose) underneath your boiler or near your airing cupboard pipes.Open the valves on the filling loop to allow cold mains water to enter the system while watching the pressure gauge.Close the valves firmly once the needle sits between 1.0 and 1.5 bar, then restart your boiler.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low to operate safely.
Locate the external filling loop (a flexible silver hose) underneath the boiler.Open the taps on both ends of the hose to allow water into the system.Monitor the pressure gauge on the front panel and close both taps once the needle reaches 1.5 bar.
on the Ferroli DOMINAplus F28D
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