While you wait for answers, we may have found some information which could help you.
Click here for Water Pressure Gauge
How to fix my fireplace?
Remove cover off gas boiler?
Worcester 30 Cadillac combi boiler won’t fire up and the EA?
Oil fired boiler thermostat?
Greenstar 24Ri boiler, fast flashing - can I reset?
One radiator in a bedroom is always cold?