While you wait for answers, we may have found some information which could help you.
Click here for Red Light Heating No Sound
Greenstar 24Ri boiler, fast flashing - can I reset?
Boiler cycle?
Siemens RDJ10RF thermostat problem?
Worcester boiler dripping water?
Vaillant ecotec 831 plus?
One radiator in a bedroom is always cold?