While you wait for answers, we may have found some information which could help you.
Click here for Rdj10rf Thermostat ReceiverSiemens brtrf keep LOSING connection?
Can I move the thermostat to another room?
red flashing button siemens RCRIO/433?
I cannot locate my Siemens receiver?
Siemens rdh10rf thermostat?
siemens rwb9 connections to boiler?