While you wait for answers, we may have found some information which could help you.
Click here for Wiring Stat WiresHorstmann Economy 7 problem?
wiring horstmann centaurstat 7?
Horstmann channel plus. The water is on all the time?
Standy by battery on Horstmann H37 XL Progammer?
horstmann ChannelPlus H37XL?
Whats wrong with my Vokera Mynute EHE boiler?