While you wait for answers, we may have found some information which could help you.
Success
Message
red flashing button siemens RCRIO/433?
Siemens RDJ10RF thermostat problem?
my rdh10rf siemans thermostat will not send signal to my boiler. ?
I cannot locate my Siemens receiver?
Rdh10 & RCR10/443-GB by seimens?
Siemans wireless heating controller battery usage?
Have I got got a faulty programmer?
Room thermostat?
Thermostat issues- Siemens RDH10RF?
How to use Siemens RWB7 central heating controller?
Siemens brtrf keep LOSING connection?
siemens rwb9 connections to boiler?