While you wait for answers, we may have found some information which could help you.
Click here for Boiler Heating Fault
Sabre he will not work with combustion cover on?
Sabre HE 3 second blinking green then flashing red when on?
No heating or hot water due to low pressure?
How can I fix my Sabre 28?
Sabre boiler keeps switching off?
how can i fix my sabre he 2.5, green light flickers on and off not staying ?