BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working because the water level inside the system is too low and needs to be topped up.
Locate the filling loop handles (usually blue or black) underneath your boiler.Slowly turn both handles 90 degrees until you hear water entering the system.Watch the pressure gauge and close both handles once the needle reaches 1.5 bar.
Your boiler has started an ignition process but the flame has unexpectedly gone out, causing the system to shut down for safety.
Check that your gas emergency control valve is open and you have credit on your gas meter.Try resetting the boiler by pressing the 'Restart' button on the front panel.Check if other gas appliances, like a cooker hob, are working to confirm gas supply is active.
Your boiler has stopped working because the electrical supply from your home to the unit is too low for it to operate safely.
Check if there is a local power cut or if other appliances in the house are flickering.Ensure the boiler is plugged into a dedicated socket and not an extension lead.Restart the boiler using the reset button once you are sure the home's power supply is stable.
Your boiler has switched itself off because it has detected it is getting too hot or there is not enough water moving through the system.
Check that your silver radiator valves (lockshields) are open and not turned off.Ensure your boiler pressure gauge is between 1 and 1.5 bar; top up using the filling loop if it is too low.Restart the boiler by pressing the ‘Reset’ button.
Your boiler has failed to ignite after five attempts and has locked itself for safety.
Check that your gas pre-payment meter (if you have one) has credit.Verify that other gas appliances, like a hob, are working to ensure gas is flowing to the property.Hold the 'Reset' button for three seconds to clear the fault and restart the ignition sequence.
Your boiler has locked itself out because it has been manually reset too many times in a short period while trying to clear an underlying fault.
Turn the boiler power off at the fused spur switch (the wall switch).Wait for at least five minutes to allow the internal timer to clear.Turn the power back on and see if a different primary fault code (such as F1 or L2) appears.
on the Ideal Logic Max Combi 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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