How do I reset the RDH100RF transmitter and receiver to factory defaults?
To reset the transmitter, simultaneously press the TEST and LEARN buttons on the rear of the transmitter. To reset the receiver, simultaneously press the OVERRIDE and LEARN buttons. This resets all individual settings to their default values. (Page 9)
From the official Siemens Rdh100rfset Wireless Room Thermostat With Lcd manual, page 9
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