BoilerFaultCodesThe 6 most common faults
Your boiler has temporarily stopped working because the water pressure inside the system has dropped too low.
Locate the filling loop underneath your boiler or near your hot water cylinder.Open the valves slowly to let water into the system until the pressure gauge reads between 1 and 1.5 bar.Close the valves firmly and check the boiler display or reset the system if necessary.
Your boiler has detected that the water pressure inside the system is too low to run safely and has switched itself off.
Locate the filling loop (usually blue-handled levers) underneath the boiler.Slowly open the valves until you hear water entering the system.Watch the pressure gauge and close the valves when the needle reaches 1.5 bar.Restart the boiler if it does not reset automatically.
Your boiler is struggling to keep its flame lit, which means the system has safely shut down to prevent issues.
Check that your gas credit hasn't run out if you have a prepayment meterEnsure other gas appliances like your hob are working to confirm your gas supply is activeCheck that the white plastic condensate pipe outside hasn't frozen in cold weatherPress the 'Reset' button on the boiler display
Your boiler is not providing central heating even though it may still be providing hot water.
Check that your room thermostat or programmer is set higher than the current room temperatureEnsure the heating mode is active on the boiler displayCheck that the radiator valves are open and not turned to zero
Your boiler has stopped trying to start up because it failed to ignite after a few attempts.
Full guide for Ignition LockoutYour boiler has temporarily locked itself out because it tried to restart itself too many times in a short period.
Full guide for Too Many Restartson the Ideal LOGIC+ SYSTEM2
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
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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