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