Remeha Gas 350 Fault codes & diagnostics

What to check first

1. Check if other appliances in your home have power.
2. Verify that the boiler's fused spur switch is turned on.
3. Check your home's main consumer unit (fuse box) to see if a circuit breaker has tripped.

Parts commonly replaced

• Internal PCB fuse
• Main Control Board
• External Fused Spur

What to check first

1. Check if other gas appliances in your home, like a hob, are working to ensure gas supply is active.
2. Check that your prepaid gas meter has credit, if applicable.
3. Press the reset button on the control panel to see if the boiler restarts.

Parts commonly replaced

• Ignition Electrode
• Ionisation Probe
• Gas Valve
• PCB

What to check first

1. Check the pressure gauge on the boiler or pipework
2. Locate the external filling loop (braided silver hose)
3. Slowly open the valves to top up the water until the pressure is between 1.0 and 1.5 bar
4. Ensure valves are closed tightly and reset the boiler

Parts commonly replaced

• Pressure sensor
• Expansion vessel
• Filling loop

What to check first

1. Check the pressure gauge on the boiler or pipework
2. Use the external filling loop to top up the system pressure to 1.5 bar
3. Ensure all radiator valves and system isolation valves are fully open
4. Restart the boiler once the correct pressure is reached

Parts commonly replaced

• Water pressure sensor
• Filling loop
• Expansion vessel

Parts commonly replaced

• High limit thermostat
• Circulation pump
• Heat exchanger cleaning kit