While you wait for answers, we may have found some information which could help you.
Click here for Heating Radiator Repair
Greenstar 24Ri boiler, fast flashing - can I reset?
Siemens RDJ10RF thermostat problem?
Remove boiler cover?
Oil fired boiler thermostat?
How do i stop the time from flashing on the Siemens RDJ100RF?
One radiator in a bedroom is always cold?