While you wait for answers, we may have found some information which could help you.
Success
Message
Remove cover off gas boiler?
Oil fired boiler thermostat?
Vaillant ecotec 831 plus?
One radiator in a bedroom is always cold?
How to fix my fireplace?
How do i stop the time from flashing on the Siemens RDJ100RF?
Siemens RDJ10RF thermostat problem?
Greenstar 24Ri boiler, fast flashing - can I reset?
Worcester 30 Cadillac combi boiler won’t fire up and the EA?
Boiler cycle?
Worcester boiler dripping water?
Remove boiler cover?