BoilerFaultCodesThe 6 most common faults
Your boiler has shut down because it has detected an unsafe increase in temperature, likely due to a circulation problem or overheating.
Check that your radiator valves are open to allow water to flow.Ensure your system water pressure is between 1 and 1.5 bar.Press the reset button on the boiler control panel once the unit has cooled down.
Your boiler has stopped working because the water pressure in the heating system is too low.
Locate the filling loop (the flexible silver hose usually found underneath the boiler).Slowly open the valves on the filling loop until you hear water flowing.Watch the pressure gauge and close the valves once it reaches between 1.0 and 1.5 bar.
Your boiler has failed to light because it isn't getting enough gas or it cannot detect a flame once it has started.
Check that your gas emergency control valve is in the 'on' position.If you have a prepayment gas meter, verify that you have credit available.Attempt to reset the boiler by pressing the reset button for five seconds.
Your boiler has become too hot and has shut itself down as a safety precaution to prevent damage.
Wait for the boiler to cool down completelyCheck all radiator valves are open and bleed any trapped air from your radiatorsPress the reset button on the boiler control panel
Your boiler has stopped working because there is not enough water pressure in the system to operate safely.
Locate the filling loop, which is a flexible silver hose usually found underneath the boiler.Slowly open the small valve handles on the filling loop until you hear water entering the system.Watch the pressure gauge and close the valves tightly once the needle reaches between 1.0 and 1.5 bar.
Your boiler has stopped working because the water isn't moving through the system properly, causing it to overheat and shut down for safety.
Check if your system pressure is between 1 and 1.5 bar on the pressure gaugeEnsure all radiator valves are open and not stuckGently bleed air from your radiators using a radiator key
on the Baxi Suprima 80
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 Baxi 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