BoilerFaultCodesThe 6 most common faults
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 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
Your boiler has tried to light several times but has been unable to successfully create or detect a flame.
Check if your gas supply is active by testing another gas appliance like a hobEnsure your gas meter has credit if you are on a prepayment meterPress the 'Reset' button on the front of the boiler for five seconds
Your boiler appears to have no electrical power at all, meaning the display is blank and the unit cannot start up.
Check if the boiler's power switch is turned onCheck your home's main fuse box (consumer unit) for a tripped circuit breakerCheck the 3-amp fuse in the fused spur switch next to the boiler
Your boiler has failed to light the gas flame after several attempts and has shut itself down for safety.
Check that your gas prepayment meter has credit (if applicable)Ensure other gas appliances in the home are working correctlyPress the 'Reset' button on the front of the boiler for five seconds
Your boiler has detected that it is getting too hot or that water isn't moving through the system correctly, causing it to shut down for safety.
Check that all radiator valves are openEnsure the system pressure is between 1 and 1.5 barPress the reset button once the boiler has cooled down
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