We may have found other answers which could help you.
Click here for Combi Heating Faulthow can i fix my sabre he 2.5, green light flickers on and off not staying ?
were is the reset button on sabre29he?
No heating or hot water due to low pressure?
How can I fix my Sabre 28?
Sabre 29he plus combi condensing Boiler?
Sabre HE 3 second blinking green then flashing red when on?