We may have found other answers which could help you.
Click here for Boiler Red Light YearsWhy does my Sabre 25HE pcb fuse keeps blowing?
How to fix my Sabre 24 passing water to the overflow?
Sabre he will not work with combustion cover on?
No heating or hot water due to low pressure?
Sabre 29he plus combi condensing Boiler?
How can I fix my Sabre 28?