BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working because it has detected it is getting too hot too quickly or there is not enough water moving through the system.
Check that your system pressure is between 1 and 1.5 bar on the pressure gaugeEnsure all radiator valves are fully open to allow water to flowCheck for any visible leaks around the boiler and pipeworkPress the reset button to see if the fault clears
Your boiler has tried to light several times but cannot establish a flame, meaning it has shut down for safety.
Check that your gas emergency control valve is open and other gas appliances like your hob are working.If you have a prepaid meter, ensure you have sufficient credit available.Press and hold the reset button for three seconds to attempt a restart.
Your boiler has stopped working because the water pressure inside the system has dropped too low.
Locate the filling loop (usually a silver flexible hose) underneath your boiler.Open the one or two taps on the hose until you hear water flowing and the pressure gauge reaches 1.5 bar.Close the taps tightly and press the restart button on the front of the boiler.
Your boiler is failing to stay lit or cannot detect its own flame, meaning it has stopped providing heating and hot water for safety.
Check if other gas appliances, like a hob, are working to confirm gas supply.If it is freezing outside, check if the white plastic condensate pipe is frozen and thaw it with warm water.Press the 'Reset' button on the front of the boiler once.
Your boiler has detected that the water is heating up too quickly or not circulating properly, which usually means the water flow is blocked.
Check that the stop taps (isolation valves) underneath the boiler are in the open position.Ensure all radiator valves are turned on and not stuck closed.Reset the boiler by turning the mode dial to 'reset' for two seconds and then back to your desired setting.
Your boiler has started to fire up but the flame has gone out, meaning the system has shut down for safety.
Check that your gas stop tap is open and other gas appliances are workingIf you have a pre-payment meter, ensure you have credit availableReset the boiler by turning the mode dial to 'reset' and then back to your desired setting
on the Ideal Compact
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