Trying to connect Honeywell Z-Wave Thermostat (YTH8320ZW1007/U)


I have a Honeywell Z-Wave Thermostat (YTH8320ZW1007/U). I’m able to control it via my alarm app Total Connect 2.0. I believe my Honeywell Tuxedo alarm control panel is the one handling the z wave communication.

I’m trying to add it to my SmartThings app. I do all of the steps listed below from the instructions, but the device is never found. I have 20+ GE z wave light switches connected, some of which are several feet further away from the hub.

Could the hub distance be an issue or would the z wave light switches be repeating the thermostat signal back to the hub?

Any suggestions on how to get the thermostat connected to SmartThings? I have a feeling SmartThings will have more features than I have with Total Connect.

From the Dashboard, tap Add device
Android: Tap Add Device Manually
Select Thermostat
Tap Honeywell Z-Wave Thermostat
If you have more than one SmartThings Hub connected, select the Location you would like to add the device to, then tap Done
While the Hub searches:
Press the System button on the left side of the thermostat’s display
Press and hold the blank center button until the display changes
The first set of numbers/arrows is the “Function” section - Scroll until you find RF10
The second set of numbers/arrows is the “Setting” section - Select 1
Press Done in the lower left corner to save and exit
When the device is discovered, a message will appear that the device was successfully connected to your SmartThings Hub
Tap Edit to rename the device
When finished, tap Done
Tap Done again to confirm

(Jimmy) #2

Did you remove it from Total Connect first?


I did not. Do I have to release it from TC before ST will find it?

(Jimmy) #4

Yup. Can only be paired to one controller at a time.


That did the trick. Thank you very much.

(Justin) #6

If any one else has the same issues you can try and follow this video!

(Steve Wolfe) #7

I purchased 3 used thermostats that had previously been connected and not removed from 1st owners system. So unlike the OP, I couldn’t remove them. However I did find another method. There is a communication chip in the thermostat. If you remove that chip, then reinsert it the old connection is erased. I attached a photo with a bit more detail on where to find the chip. Once I did this, I was able to connect all the thermostats per the regular method.

(Jimmy) #8

You can exclude a device from SmartThings that was previously connect to any other system.