We may have found other answers which could help you.
Click here for Heating System Pressure Filling LoopSabre boiler keeps switching off?
Sabre he will not work with combustion cover on?
Sabre 29he plus combi condensing Boiler?
Sabre HE 3 second blinking green then flashing red when on?
sabre 28?
Why does my Sabre 25HE pcb fuse keeps blowing?