BoilerFaultCodesThe 6 most common faults
Your boiler has safely shut itself down and refuses to start up again because it failed to ignite properly.
Check that your gas supply is turned on and other gas appliances like the cooker are working.Look at the condensate pipe outside to ensure it is not frozen or blocked.Locate the reset button on your boiler, press and hold it for up to 10 seconds to see if the ignition cycle restarts.
Your boiler's internal computer brain has encountered a glitch or failure and is struggling to run its operating system.
Switch the boiler's electrical power supply off at the fused spur switchWait for approximately 60 secondsSwitch the power back on and see if the error clears
Your boiler has stopped trying to light because it failed to detect a flame, meaning you currently have no heating or hot water.
Check if other gas appliances in your home are working to confirm your gas supply is on.Locate the reset button on your Glow-worm Micron 80 FF and hold it down for up to 5 seconds to try and restart the boiler.Check that your pre-payment gas meter has credit if applicable.
Your boiler's main electronic control center has stopped working properly, which means the boiler cannot safely operate and has shut down.
Full guide for PCB FailureYour boiler has registered an unspecified system error that requires a professional engineer to properly diagnose and resolve.
Full guide for Other ErrorsYour boiler is operating normally and the burner is currently lit to provide your heating or hot water.
Full guide for Burner Liton the Glow-worm Micron 80 FF
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 Glow-worm 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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