Ravenheat HE 80/90 / 25-30s Fault codes & diagnostics

What to check first

1. Locate the filling loop (usually a silver flexible hose) underneath the boiler.
2. Slowly open the one or two taps/valves on the filling loop until you hear water entering.
3. Watch the pressure gauge and close the valves once the needle reaches between 1 and 1.5 bar.

Parts commonly replaced

• Filling loop
• Expansion vessel
• Pressure sensor

Parts commonly replaced

• Ignition electrode
• Gas valve
• PCB

Related codes

• E02
• E03

What to check first

1. Locate the filling loop (usually a silver braided hose) underneath the boiler.
2. Open the small valve or valves on the loop slowly until you hear water entering.
3. Watch the pressure gauge until it reaches between 1 and 1.5 bar, then close the valves tightly.

Parts commonly replaced

• Filling loop
• Pressure sensor
• Expansion vessel

Related codes

• E04
• E05