We may have found other answers which could help you.
Click here for Boiler Heating Combination
Protherm 100ec overheat trip problem?
Protherm 80e - Fault F1?
my protherm 100ec combi keeps giving the fault f1?
No hot water?
my protherm 40-50ci boiler blows fuse?
can i repair a diverter valve for a protherm 80e?