We may have found other answers which could help you.
Click here for Boiler Heating Pressure
Why does my Sabre 25HE pcb fuse keeps blowing?
Sabre boiler keeps switching off?
How can I fix my Sabre 28?
Sabre 29he plus combi condensing Boiler?
how can i fix my sabre he 2.5, green light flickers on and off not staying ?
No heating or hot water due to low pressure?