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