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