Thermostat not working?

If your Siemens RDH10 RF thermostat stopped working after new batteries, the most common issue is that it has lost its RF pairing with the receiver. Re-insert the batteries (check polarity) and follow the re-pair / link procedure for the receiver. Also check the battery contacts are clean and use fresh alkaline batteries. If it still won’t connect, the thermostat may be faulty. General battery and reset guidance can be found here:
https://manualslibraryy.com/hunter-44110-programmable-thermostat-user-manual/

Tech pro
December 2025