BoilerFaultCodesThe 6 most common faults
Your boiler has become too hot and has shut itself down as a safety precaution to prevent damage.
Check that all radiator valves are fully openEnsure the system water pressure is between 1 and 1.5 barWait for the boiler to cool down and press the 'Reset' button
Your boiler has lost water pressure or the water isn't moving through the system properly, which has triggered a safety shutdown to prevent overheating.
Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.If the pressure is low, use the filling loop valves underneath the boiler to top it up.Ensure all radiator valves and lockdowns are open to allow water to flow.Restart the boiler once the correct pressure is reached.
Your boiler is failing to light the gas flame required to heat your water and radiators.
Check that your gas emergency control valve is in the 'on' positionIf you have a prepayment meter, check that you have sufficient creditPress and hold the reset button for at least two seconds
Your boiler has failed to light the burner after several attempts and has shut down as a safety precaution.
Check that your gas supply is turned on at the meterEnsure any other gas appliances in the home are working correctlyPress and hold the reset button for at least two secondsCheck if the system pressure gauge is between 1 and 1.5 bar
Your boiler has no power and is completely unresponsive, meaning it cannot provide any heating or hot water.
Check if the boiler's main power switch is turned onCheck your home's consumer unit (fuse box) for a tripped circuit breakerReplace the fuse in the boiler's external electrical spur switch (usually a 3-amp fuse)
Your boiler has detected low water pressure or a circulation issue, preventing it from heating up to protect the system.
Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.If pressure is low, use the filling loop underneath the boiler to top it up until the needle reaches 1.2 bar.Ensure all radiator valves are open and bleed any air from the radiators using a radiator key.
on the Biasi Riva Compact 24S (M90E.24S)
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 Biasi 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