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