BoilerFaultCodesThe 6 most common faults
Your boiler is failing to light the gas burner, which means it cannot provide heat or hot water.
Check if other gas appliances in your home, like a hob, are working to confirm your gas supply is on.Ensure your gas meter has credit if you use a prepay meter.Press the 'Reset' button on the front control panel and wait for the boiler to restart.
Your boiler has stopped working because water is not moving around the internal system properly, causing it to shut down to prevent overheating.
Check that the boiler pressure gauge is between 1 and 1.5 barEnsure all radiator valves and isolation valves under the boiler are fully openGently bleed your radiators to remove any trapped air pocketsReset the boiler using the 'R' or Reset button
Your boiler has detected that there is not enough water pressure in the system to operate safely.
Locate the filling loop (usually a silver braided hose with small valves underneath the boiler).Open the valves slowly until you hear water flowing and the pressure gauge reaches between 1.0 and 1.5 bar.Close the valves tightly and restart the boiler.
Your boiler has detected that it is running too hot and has automatically shut down for safety to prevent damage.
Full guide for 01Your boiler has stopped working because a sensor inside is detecting that the water is overheating or not circulating correctly.
Full guide for 05Your boiler has failed to ignite properly and has locked out for safety because it cannot detect a stable flame.
Full guide for 06on the Chaffoteaux Centora Green 24
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 Chaffoteaux 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