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