BoilerFaultCodesThe 6 most common faults
Your boiler has temporarily stopped working because the water pressure inside the system has dropped too low.
Locate the filling loop underneath your boiler, which usually consists of a silver braided hose and one or two small valves.Open the valves slowly to allow water into the system, and watch the pressure gauge on the front panel until the needle sits between 1.0 and 1.5 bar.Firmly close both valves and check the gauge holds steady, then reset your boiler if it does not restart automatically.
Your boiler has temporarily stopped working because water is not flowing through the system properly, causing it to overheat internally.
Check that the valves underneath the boiler (flow and return isolation valves) are fully open.Check that at least some of your radiators around the house have their valves fully open.Check your boiler pressure gauge to ensure it is sitting between 1 and 1.5 bar, and top it up using the filling loop if necessary.
Your boiler has stopped working because it failed to ignite after five attempts and has safely locked itself out.
Full guide for L 2Your boiler has temporarily locked itself out because it kept trying and failing to restart too many times in a short period.
Full guide for LCYour boiler has stopped working because it tried to start up several times but failed to detect a flame.
Full guide for L2Your boiler has detected that the burner has gone out or failed to stay lit while trying to heat your home.
Full guide for F2 or Fn or Lnon the Ideal i-mini C24 / C30
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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