BoilerFaultCodesThe 6 most common faults
Your boiler has failed to light several times and has shut down for safety, meaning you currently have no heating or hot water.
Check if your gas supply is active by testing another gas appliance like a hob.Check if your condensate pipe (the white plastic pipe outside) is frozen or blocked.Reset the boiler by turning the control knob to 'Reset' and holding for two seconds.
Your boiler has stopped heating because water is not moving through the system properly.
Check that your home's water pressure gauge is between 1 and 1.5 barOpen all radiator valves and ensure no radiators are blocked by airRestart the boiler by pressing the 'Reset' button
Your boiler has lost its flame while trying to run, which means it cannot heat your water or your radiators.
Check that your gas supply is turned on at the meterIf you have a prepay meter, check that you have enough creditPress the Reset button on the boiler displayEnsure your external condensate pipe hasn't frozen in very cold weather
Your boiler has lost its flame while running, meaning it is not getting enough gas or the spark is failing to keep the burner lit.
Check if your gas meter has credit (if on a prepayment meter)Check if other gas appliances, like a hob, are working to confirm gas supplyReset the boiler by turning the mode knob to 'RE' and then back to the desired settingEnsure the external condensate pipe has not frozen if it is winter
Your boiler has detected that heat is building up too quickly and cannot circulate around your home, likely due to a blockage or a pump failure.
Check that the main isolation valves underneath the boiler are fully openEnsure at least two or three radiators have their valves turned to the maximum settingCheck that the boiler pressure is between 1.0 and 1.5 bar on the gauge
Your boiler has temporarily locked itself out because the water inside is getting too hot or is not flowing properly.
Full guide for L1on the Ideal LOGIC HEAT
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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