We may have found other answers which could help you.
Click here for Combi Fault Hello Boilermy protherm 40-50ci boiler blows fuse?
protherm combi?
can i repair a diverter valve for a protherm 80e?
problem with protherm 80e?
my protherm 100ec combi keeps giving the fault f1?
Protherm 80e - Fault F1?