# Honeywell T6 Pro Z-Wave Thermostat not working **URL:** \ **Category:** Questions & Help\ **Created:** [June 25, 2025, 7:08pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723 "2025-06-25T19:08:51Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Kenneth\_Wilson](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/kenneth_wilson/32/123124_2.png) [@Kenneth\_Wilson](https://community.homey.app/u/Kenneth_Wilson)\ **Post date:** [June 25, 2025, 7:08pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/1 "2025-06-25T19:08:51Z")
Need to get a Honeywell T6 Pro Z-Wave Thermostat working with Homey Pro, but haven’t been successful. Installed the Homey Pro Honeywell app & when pairing it, I get an error message indicating that the device is unknown. It adds it as a device anyway, but when clicking on this device it indicates an error as an unknown device. Does anyone have a Honeywell T6 Pro Z-Wave Thermostat working with Homey Pro? ---
**Author:** ![Jose\_Acevedo](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jose_acevedo/32/121525_2.png) [@Jose\_Acevedo](https://community.homey.app/u/Jose_Acevedo)\ **Post date:** [March 21, 2026, 4:52pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/2 "2026-03-21T16:52:24Z")
Hello! Any success on this? ---
**Author:** ![Niels\_van\_der\_Voort](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/niels_van_der_voort/32/66463_2.png) [@Niels\_van\_der\_Voort](https://community.homey.app/u/Niels_van_der_Voort)\ **Post date:** [May 19, 2026, 8:05pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/3 "2026-05-19T20:05:45Z")
The honeywell home app isn’t working anymore. it seems the api certificate is expired and i found some news regarding a new end point [api.honeywellhome.com](http://api.honeywellhome.com) instead of [api.honeywell.com](http://api.honeywell.com). Who can fix this? ---
**Author:** ![smarthomesven](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/smarthomesven/32/79712_2.png) [@smarthomesven](https://community.homey.app/u/smarthomesven)\ **Post date:** [May 20, 2026, 12:02pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/4 "2026-05-20T12:02:05Z")
> [@Honeywell T6 token issue](https://community.homey.app/t/honeywell-t6-token-issue/155109/3): > > Hi all, Honeywell changed their api endpoint from [http://api.honeywell.com/](http://api.honeywell.com/) to [http://api.honeywellhome.com/](http://api.honeywellhome.com/). We updated the address in our backend and this issue should be fixed now. If you still get the “oauth token failed” error, the old address may still be cached. In that case, please reboot your Homey. ---
**Author:** ![ChefsSlaad](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/chefsslaad/32/146960_2.png) [@ChefsSlaad](https://community.homey.app/u/ChefsSlaad)\ **Post date:** [May 20, 2026, 12:09pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/5 "2026-05-20T12:09:38Z")
Thanks for bringing this up @Niels_van_der_Voort . ---
**Author:** ![jdell42](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jdell42/32/79290_2.png) [@jdell42](https://community.homey.app/u/jdell42)\ **Post date:** [May 20, 2026, 1:28pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/6 "2026-05-20T13:28:11Z")
Has anyone successfully connected their T Series thermostat? I get stuck on the credentials page. I have the Honeywell “First Alert” app and those credentials do not work. I notice the credentials page when trying to connect is called “Resideo”. I am wondering if I need to create new credentials somewhere else. ---
**Author:** ![Bill\_Hartmann](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/bill_hartmann/32/79500_2.png) [@Bill\_Hartmann](https://community.homey.app/u/Bill_Hartmann)\ **Post date:** [October 6, 2026, 1:34am UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/7 "2026-10-06T01:34:59Z")
Is there any hope for this in the near future? ---
**Author:** ![Lumpkins\_Family](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/lumpkins_family/32/179361_2.png) [@Lumpkins\_Family](https://community.homey.app/u/Lumpkins_Family)\ **Post date:** [October 16, 2026, 2:59pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/8 "2026-10-16T14:59:15Z")
THIS! WHO KNOWS HOW TO GET PAST THIS ROADBLOCK? ![101](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/3/8/38d604e8a59f67554684cc9b34829ba97565c531.jpeg) So it sees my thermostat Of course I click connect ![103](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/0/3/03e267d9f70c28e1e3e3ced0d824106510f3cb8d.jpeg) Cool manufacturer website ahead, homey active in the background, full speed ahead … straight into a brick wall ![105](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/8/0/8051b64a9ed9d1476a6ff1f01c2c422249c0c746.jpeg) THIS PAGE (ABOVE) is mildly infuriating. What makes them believe that EVERY SINGLE PERSON who makes it to this page already has an account? At least tell me where to go to create an account that will allow me to log in when I get back to this page. So I click the x in the top left corner ![107](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/d/a/dafb0154bb2f50ee9e5d18e621abf51e6abd3541.jpeg) And then I click the x in the top right corner ![109](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/0/a/0a5f89f42fa363cc8ffe80bfb4c0f38644e109e3.jpeg) No I don’t want to abort the setup process, but I have no idea how to f\*\*\* to log in. There’s no instructions that I see in the app from homey… Repeatedly I see this issue posed in this community, I’ve yet to see a solution but I see people who are able to get there t6 thermostats connected so I know there has to be a solution. why won’t anyone answer with the solution? ---
**Author:** ![smarthomesven](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/smarthomesven/32/79712_2.png) [@smarthomesven](https://community.homey.app/u/smarthomesven)\ **Post date:** [October 16, 2026, 3:07pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/9 "2026-10-16T15:07:42Z")
Because everyone who needs to log in there already has an account. It’s the same account as the Honeywell mobile app. You need to set it up there first, and then you can connect the thermostat to Homey ---
**Author:** ![Lumpkins\_Family](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/lumpkins_family/32/179361_2.png) [@Lumpkins\_Family](https://community.homey.app/u/Lumpkins_Family)\ **Post date:** [October 16, 2026, 3:27pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/10 "2026-10-16T15:27:00Z")
Set it up WHERE? perhaps, possibly, idk if this bit of information helps… I did not buy this thermostat. It came pre installed in the brand new condo I moved into. No owners manual. No set up on my part. Just there… Attached to the wall. Idk where to go to do any of this. Please. This is the first device I am adding to my Homey and I don’t want to return it (the Homey Pro 2026), but if this doesn’t work, I’m not sure what choice I have. I was tech savvy 25 years ago. When we went from DOS prompt to Windows, I was everyone’s tech support. But the world has changed so much so fast, and I just haven’t kept up. Please kindly break it down in a way a kindergartner might understand. And just to be clear… I have Homey Pro 2026 and Honeywell TH6320ZW2007 Z-wave Thermostat ---
**Author:** ![Arie\_J\_Godschalk](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/arie_j_godschalk/32/63027_2.png) [@Arie\_J\_Godschalk](https://community.homey.app/u/Arie_J_Godschalk)\ **Post date:** [October 16, 2026, 4:24pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/11 "2026-10-16T16:24:31Z")
> [@Lumpkins\_Family](#): > > I have Homey Pro 2026 and Honeywell TH6320ZW2007 Z-wave Thermostat Install the Homeywell app on your phone (not the homey app, just a regular app), and follow the steps to setup an account and add the thermostat. After that you can add it to homey using the same credentials. ---
**Author:** ![smarthomesven](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/smarthomesven/32/79712_2.png) [@smarthomesven](https://community.homey.app/u/smarthomesven)\ **Post date:** [October 16, 2026, 4:51pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/12 "2026-10-16T16:51:14Z")
The T6 Pro works with the Resideo mobile app. Install it for [Android](https://play.google.com/store/apps/details?id=com.honeywell.android.lyric) or [iOS](https://apps.apple.com/app/id880332077) and follow the setup instructions there ---
**Author:** ![jdell42](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jdell42/32/79290_2.png) [@jdell42](https://community.homey.app/u/jdell42)\ **Post date:** [October 16, 2026, 5:35pm UTC](https://community.homey.app/t/honeywell-t6-pro-z-wave-thermostat-not-working/138723/13 "2026-10-16T17:35:56Z")
I was equally frustrated and developed my own app for my own personal use. I cant guarantee it will work for you but its here. Anthom is not willing to release it because they claim their app works. You will need to download the Honeywell App and create an account. My App can handle the old Honeywell credentials or the new Residio credentials (or at least it did when I developed it a few months ago) > **[Honeywell Home | Homey](https://homey.app/en-us/app/com.dellarciprete.honeywellt5/Honeywell-Home/test/)** > > Your home's temperature, right from Homey. Do me a favor and tell Anthom their existing app is a POS. #### _Anthom Reviewer_ #### \*Hi John, Thank you for resubmitting your app and providing some additional information. You mentioned that the official Honeywell app by Athom does not work. I am very sorry to hear that the app is not working as expected. However there have been no reports through our official support channel about the Honeywell app in the last few months. If there are any active issues please report them via our own support form. Unfortunately issues that are discussed in a community thread do not always reach us.\*