We may have found other answers which could help you.
Click here for Boiler Heating Installation
Sabre boiler keeps switching off?
How can I fix my Sabre 28?
No heating or hot water due to low pressure?
how to fix sabre he plus?
how can i fix my sabre he 2.5, green light flickers on and off not staying ?
Sabre he will not work with combustion cover on?