BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working because the water inside has become too hot or is not circulating through the system correctly.
Check that your radiator valves are openEnsure there are no blockages or frozen pipes (if applicable)Reset the boiler by turning the mode knob to 'reset' and then back to the original setting
Your boiler has stopped working because there is not enough water inside the system to operate safely.
Locate the filling loop (usually a silver flexible hose) underneath the boiler.Slowly open the one or two taps on the hose until you hear water flowing.Watch the pressure gauge and close the taps when the needle reaches between 1 and 1.5 bar.
Your boiler has started an ignition process but the flame has gone out, meaning your system has shut down for safety.
Check that your gas emergency control valve is open and you have credit on your gas meterCheck if other gas appliances, like a hob, are working correctlyPress the 'Reset' button on the front of the boiler display
Your boiler has lost water pressure, meaning there isn't enough water in the system to operate safely and effectively.
Locate the filling loop (braided silver hose) underneath or near the boiler.Open the small taps on the filling loop until the pressure gauge rises to between 1.0 and 1.5 bar.Close the taps tightly and restart the boiler.
Your boiler has detected that there is not enough water in the system to operate safely, causing it to shut down to prevent damage.
Locate the filling loop (the flexible silver hose) underneath the boiler.Slowly open the one or two taps/valves on the filling loop until you hear water flowing.Watch the pressure gauge and close the taps firmly once the needle reaches between 1 and 1.5 bar.
Your boiler has shut itself down because it has become too hot to operate safely.
Full guide for H 9on the Ideal Esprit
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 Ideal 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