BoilerFaultCodesThe 6 most common faults
Your boiler has failed to ignite or has lost its flame, meaning it has shut down as a safety precaution.
Check that your gas supply is turned on at the meterPress and hold the 'Reset' button for five secondsEnsure there is credit on your gas meter if you use a pre-payment system
Your boiler has detected that it is getting too hot and has shut down as a safety precaution.
Ensure all radiator valves are fully open to allow water to circulateCheck that the boiler pressure is between 1.0 and 1.5 barPress and hold the 'Reset' button to restart the system
Your boiler has detected low water pressure, which prevents it from firing up to provide heating or hot water.
Locate the filling loop (usually a silver flexible hose) underneath the boiler.Slowly open the valves until you hear water flowing and the pressure gauge reaches between 1 and 1.5 bar.Close the valves tightly and press the Reset button to restart the boiler.
Your boiler has likely detected a circulation or temperature sensor problem and is currently locked out for safety.
Locate the selector knob on the front panel.Turn the knob to the 'Reset' position for five seconds.Return the knob to the original setting (Heating or Hot Water) and wait for the boiler to restart.
Your boiler has failed to ignite after several attempts, meaning it cannot produce heat or hot water.
Check if other gas appliances like a hob are working to ensure gas supplyPress and hold the reset button for five secondsCheck that the condensate pipe outside hasn't frozen in cold weather
Your boiler has detected that the water pressure is too low to operate safely.
Locate the filling loop valves underneath the boiler.Slowly open both taps to let fresh water into the system.Watch the pressure gauge and close the taps once the needle reaches between 1 and 1.5 bar.
on the Biasi Parva 28S
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