BoilerFaultCodesThe 6 most common faults
Your boiler has likely overheated, causing a safety sensor to automatically shut the system down to prevent damage.
Check that your radiator valves are open and not turned off.Ensure your system water pressure is between 1.0 and 1.5 bar on the gauge.Wait for the boiler to cool down, then turn the selector switch to the 'R' (Reset) position for at least five seconds.
Your boiler has stopped working because the water pressure is too low and needs to be topped up.
Locate the filling loop, which is usually a flexible silver hose underneath the boiler.Slowly open both taps on the filling loop until you hear water flowing.Watch the pressure gauge and close the taps once the needle reaches between 1 and 1.5 bar.
Your boiler has detected that water is not moving around the system correctly, which is causing it to overheat and shut down for safety.
Check that all radiator valves are fully openCheck that the boiler pressure is between 1.0 and 1.5 bar on the gaugeGently bleed your radiators to remove any trapped air pockets
Your boiler has failed to ignite, which means it cannot provide the heat or hot water you need.
Check if your gas meter has credit and the gas emergency valve is open.Try to reset the boiler by turning the selector knob to the 'R' position for at least five seconds.If it is freezing outside, check if your white plastic condensate pipe is blocked with ice.
Your boiler has detected that water is not circulating correctly through the system before the burner ignites, often caused by a buildup of air or a blockage.
Check that your system pressure is between 1.0 and 1.5 bar on the pressure gaugeBleed all radiators to remove any trapped air pocketsEnsure all radiator valves and isolation valves under the boiler are fully open
Your boiler has become too hot and has shut itself down for safety, which is often caused by trapped air blocking the flow of water.
Turn off the boiler and wait for it to cool down completely.Use a radiator key to bleed all radiators to remove any trapped air.Check the boiler pressure gauge and top up to between 1 and 1.5 bar if it has dropped.Perform a 'Reset' by turning the selector switch to the R position for at least five seconds.
on the Baxi Performa
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