# Honeywell T6 token issue

**URL:** <https://community.homey.app/t/honeywell-t6-token-issue/155109>\
**Category:** Questions & Help\
**Created:** [May 20, 2026, 11:31am UTC](https://community.homey.app/t/honeywell-t6-token-issue/155109 "2026-05-20T11:31:10Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Yorgi\_D](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/yorgi_d/32/126782_2.png) [@Yorgi\_D](https://community.homey.app/u/Yorgi_D)\
**Post date:** [May 20, 2026, 11:31am UTC](https://community.homey.app/t/honeywell-t6-token-issue/155109/1 "2026-05-20T11:31:10Z")

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Hello,

New user of a homey pro here.  
i have an issue when i want to add my Honeywell T6 thermostat.  
login & selecting device is ok but when i want to add the devide i receive the following:

"request to [https://api.honeywell.com/oauth2/token](https://api.honeywell.com/oauth2/token) failed, reason: certificate has expired. "

and then nothing happens…

anybody have a solution for this ?

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**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\
**Post date:** [May 20, 2026, 11:33am UTC](https://community.homey.app/t/honeywell-t6-token-issue/155109/2 "2026-05-20T11:33:27Z")

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> [@Yorgi\_D](#):
>
> anybody have a solution for this ?

Wait for Honeywell to fix their website (certificate expired 2 days ago).

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**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, 11:53am UTC](https://community.homey.app/t/honeywell-t6-token-issue/155109/3 "2026-05-20T11:53:12Z")

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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.

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**Author:** ![Yorgi\_D](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/yorgi_d/32/126782_2.png) [@Yorgi\_D](https://community.homey.app/u/Yorgi_D)\
**Post date:** [May 20, 2026, 2:17pm UTC](https://community.homey.app/t/honeywell-t6-token-issue/155109/4 "2026-05-20T14:17:27Z")

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Solved, thanks !!