While you wait for answers, we may have found some information which could help you.
Click here for Wrong Wonder Help WorkingWhats wrong with my Vokera Mynute EHE boiler?
Horstmann channelplus model H37 - ch won't come on?
Fix?
does the battery control my horstmann eco7 timer?
horstmann channel plus h 37 xl?
Horstmann channel plus. The water is on all the time?