BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working because the water pressure inside the system is too low to operate safely.
Locate the filling loop (usually a flexible silver hose) underneath the boiler.Open the valves to allow mains cold water into the system until the pressure gauge reads between 1.0 and 1.5 bar.Close both valves tightly to stop the inflow of water.
Your boiler is struggling to move water through the system, likely due to low water pressure or a blockage.
Check your boiler pressure gauge; if it is below 1 bar, use the filling loop to top it up to 1.5 barEnsure all radiator valves are fully openCheck if your central heating pump is running or if it is stuck and needs a manual restart
Your boiler has detected that water is not flowing through the system correctly, which is preventing it from heating your home safely.
Check your central heating pressure gauge to ensure it is between 1 and 1.5 barIf the pressure is low, use the filling loop to top it up to the correct levelEnsure all radiator valves are fully openReset the boiler using the reset button on the control panel
Your boiler has detected that water is not flowing around your heating system properly, so it has shut down to prevent damage.
Check your boiler pressure gauge and top it up to 1.5 bar if it is below 1.0 barEnsure all radiator valves are fully openCheck that your external heating system pump is running and not seized
Your boiler has detected that water is not moving around your heating system properly, which has caused it to stop working to prevent damage.
Check the system pressure gauge on the front of the boiler; if it is below 1 bar, use the filling loop to top it up to 1.5 bar.Ensure all radiator valves are fully open to allow water to circulate freely.Reset the boiler using the reset button on the control panel.
Your boiler is struggling to pump water around your heating system effectively, usually due to low pressure or trapped air.
Check your boiler's pressure gauge and top it up to between 1 and 1.5 bar using the filling loop if it is too low.Bleed your radiators to remove any trapped air that might be blocking the flow.Ensure all radiator valves are fully open to allow water to circulate freely.
on the Chaffoteaux Talia Green System
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