Ferroli DOMINAplus F28D Fault codes & diagnostics

What to check first

1. Locate the filling loop (a flexible metal hose) underneath your boiler or near your airing cupboard pipes.
2. Open the valves on the filling loop to allow cold mains water to enter the system while watching the pressure gauge.
3. Close the valves firmly once the needle sits between 1.0 and 1.5 bar, then restart your boiler.

Parts commonly replaced

• Filling loop
• Pressure gauge
• Pressure relief valve

What to check first

1. Locate the external filling loop (a flexible silver hose) underneath the boiler.
2. Open the taps on both ends of the hose to allow water into the system.
3. Monitor the pressure gauge on the front panel and close both taps once the needle reaches 1.5 bar.

Parts commonly replaced

• Filling loop
• Pressure gauge
• Pressure safety valve

Parts commonly replaced

• Air pressure switch
• Flue fan assembly
• Venturi

Parts commonly replaced

• Central heating flow NTC sensor
• Wiring harness

Related codes

• E06

What to check first

1. Locate the filling loop (a silver braided hose) underneath the boiler
2. Open the small valve or tap attached to the hose slowly
3. Watch the pressure gauge on the front of the boiler until the needle reaches between 1 and 1.5 bar
4. Close the valve tightly to stop the flow of water

Parts commonly replaced

• Filling loop
• Pressure relief valve
• Pressure gauge

What to check first

1. Locate the filling loop, which is usually a flexible silver hose with one or two small valves connecting your boiler or nearby pipework.
2. 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.
3. Close the valve(s) tightly and check that the fault light has cleared.

Parts commonly replaced

• Pressure relief valve
• Pressure sensor
• Expansion vessel

Parts commonly replaced

• Ignition electrode
• Gas valve
• Main PCB

What to check first

1. Locate the external filling loop, which is a flexible braided hose connecting your central heating pipework to your mains water pipe.
2. 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.
3. Close both valves firmly once the needle sits between 1.0 and 1.5 bar.

Parts commonly replaced

• Pressure relief valve
• Pressure transducer
• Expansion vessel

Parts commonly replaced

• Overheat thermostat
• Ignition electrode
• Gas valve
• PCB