While you wait for answers, we may have found some information which could help you.
Click here for Boiler Heating Repair Kitcan i repair a diverter valve for a protherm 80e?
Protherm 100ec overheat trip problem?
No hot water?
my protherm 40-50ci boiler blows fuse?
problem with protherm 80e?
my protherm 100ec combi keeps giving the fault f1?