We may have found other answers which could help you.
Click here for Boiler Heating Pressure Loss
Protherm 80e - Fault F1?
my protherm 40-50ci boiler blows fuse?
Protherm 100ec overheat trip problem?
protherm combi?
Protherm 100ec Boiler won't light?
can i repair a diverter valve for a protherm 80e?