BoilerFaultCodesThe 6 most common faults
Your boiler has shut down because it has detected it is getting too hot or that water is not moving through the system properly.
Check that your central heating valves and radiator valves are fully openEnsure your system pressure is between 1.0 and 1.5 bar on the pressure gaugePress the 'Reset' button on the front of the boiler control panel
Your boiler has failed to light, which means it cannot provide any heating or hot water until the gas supply or ignition system is restored.
Check if other gas appliances, such as a hob, are working to confirm gas is reaching the propertyEnsure your gas meter has credit and the emergency control valve is in the 'on' positionPress the 'Restart' button on the front of the display panel
Your heating controls cannot communicate with the boiler, which usually means the batteries in your wall thermostat have run out of power.
Locate your wall-mounted room thermostat or handheld controller.Remove the battery compartment cover or detach the unit from its backplate.Replace the old batteries with a fresh set of high-quality alkaline batteries (typically AA or AAA).Check the boiler display to see if the fault code has cleared and test the heating.
Your boiler has stopped working because the water level inside the heating system has dropped too low and needs to be topped up.
Locate the filling loop, which is usually a flexible silver hose with two small valves underneath the boiler.Slowly open both valve handles until you hear water running and watch the pressure gauge.Close both valves tightly once the pressure gauge reaches 1.5 bar.
Your boiler has sensed that there isn't enough water circulating inside the system to operate safely, which stops it from over-heating.
Check the pressure gauge on the front of the boiler or under the casing.If the pressure is below 1.0 bar, use the filling loop handles to top the system up to 1.5 bar.Ensure all radiator valves are open and not stuck shut.Restart the boiler by pressing the 'Reset' button.
Your boiler has stopped working because it cannot detect any water moving through the system to keep it running safely.
Check that your boiler pressure gauge is between 1 and 1.5 barIf the pressure is too low, use the filling loop handles underneath the boiler to top it upEnsure all radiator valves and any isolation valves under the boiler are fully open
on the Ideal Logic Max System 2
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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