BoilerFaultCodesThe 6 most common faults
Your boiler has switched itself off because the internal water temperature has become too hot, usually caused by a lack of water flow through the system.
Check that your radiator valves are fully openEnsure your boiler pressure is between 1 and 1.5 bar on the gaugeReset the boiler by turning the control knob to 'RE' or pressing the reset button
Your boiler has temporarily stopped working because it tried to start up five times without successfully lighting.
Check that your gas supply is turned on and other gas appliances are working.Check your prepaid gas meter has credit if you use one.Locate the reset button on your boiler, press and hold it for 5 seconds to see if it fires up again.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Locate the internal filling loop, which is usually a small silver lever or a braided hose under the boiler.Open the filling valve slowly until the pressure gauge on the front of the boiler reads between 1.0 and 1.5 bar.Close the valve tightly and check that the fault code disappears.
Your boiler has temporarily stopped working because it failed to light successfully five times in a short space of time.
Full guide for LCYour boiler thinks a flame is burning even though it shouldn't be, causing the system to shut down for safety.
Full guide for L6Your boiler is failing to stay lit, which means it has safely shut itself down because it cannot consistently produce or hold a flame.
Full guide for F2 Or Fn Or Lnon the Ideal ESPRIT ECO2
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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