While you wait for answers, we may have found some information which could help you.
Success
Message
Siemens RDJ10RF thermostat problem?
Worcester boiler dripping water?
Boiler cycle?
Greenstar 24Ri boiler, fast flashing - can I reset?
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?
Remove cover off gas boiler?
Oil fired boiler thermostat?
Vaillant ecotec 831 plus?
Worcester 30 Cadillac combi boiler won’t fire up and the EA?
Remove boiler cover?