While you wait for answers, we may have found some information which could help you.
Success
Message
How to fix a leak between the burner and heat exchanger?
Fault codes LF and H2 on my isar He30?
Can you help with a part number or name?
should i get my boiler fixed or replaced?
Isar Boiler?
my isar he24 keeps flashing h3what does this mean?
Isar HE 35 heats central instead of warm water?
fault code meaning?
isar he24 heating on permantly?
yet another problem ideal isar he30?
l and f flasing on isar he24 boiler?
re-filling?