We may have found other answers which could help you.
Click here for Going Saunier Thema'f19' error report - Saunier Duval 'Thermoclassic' boiler?
I have a Saunier Duval Isotwin condens F 35 E with hot water No heating?
Saunier D’uval therma classuc?
saunier Duval is over pressurising when the heating is on. ?
I need to find the reset switch ?
How to repair F4 code?