Common problems guide

The most common Ideal INDEPENDENT COMBI2 problems

The faults most likely to send a Ideal INDEPENDENT COMBI2 into lockout — with plain-English causes, what to check first, estimated repair costs and whether you need a Gas Safe engineer.

29 documented codes
6 most common
0 DIY-safe checks
6 engineer needed

The 6 most common faults

01
L01 Engineer

Boiler is in Lockout for a specific error. Display will show a number after the “L” to indicate which error is detected

Full guide for L01
04
F01 Engineer

Boiler has a fault for a specific error. Display will show a number after the “F” to indicate which error is detected.

Full guide for F01

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
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See the full 29-code list for the Ideal INDEPENDENT COMBI2

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Boiler losing pressure → No hot water → When to replace → Symptom checker →