# Heatit z-trm3 lost contact with Homey after 7.1.5 **URL:** \ **Category:** Questions & Help\ **Created:** [October 28, 2021, 2:15pm UTC](https://community.homey.app/t/heatit-z-trm3-lost-contact-with-homey-after-7-1-5/53880 "2021-10-28T14:15:22Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Can42](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/can42/32/36544_2.png) [@Can42](https://community.homey.app/u/Can42)\ **Post date:** [October 28, 2021, 2:15pm UTC](https://community.homey.app/t/heatit-z-trm3-lost-contact-with-homey-after-7-1-5/53880/1 "2021-10-28T14:15:22Z")
Starting with the latest Homey 7.1.5 update, I have now lost contact with 3 Heatiit Z-TRM3 thermostats. 2 of them are still ‘reachable’ - but they do not respond to commands. Be grateful for any advice on this. Have tried restarting both Homey and the thermostat. Hesitant to reset Z-wave as I have more then 20 devices, including dimmers in ceiling and walls adrian ---
**Author:** ![DirkG](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/dirkg/32/118897_2.png) [@DirkG](https://community.homey.app/u/DirkG)\ **Post date:** [October 28, 2021, 3:49pm UTC](https://community.homey.app/t/heatit-z-trm3-lost-contact-with-homey-after-7-1-5/53880/2 "2021-10-28T15:49:51Z")
There is a separate thread for HeatIt. HeatIt itself is more or less active in this thread. It would be better to post your questions/problems in this thread. > [@\[APP\]\[Pro\] Heatit Controls app \[v4.2.6\]](https://community.homey.app/t/heatit-z-wave-app-v2-7-1/49914): > > This app adds support for devices made by [Heatit controls](http://www.heatit.com). Links: [Heatit Controls Athom app](https://apps.athom.com/app/no.thermofloor)[Heatit Controls Beta Athom app](https://homey.app/en-us/app/no.thermofloor/Heatit-Controls/test/)Supported Languages: English Dutch (partially) Changelog: 4.2.6 Fixed ZM-dimmer dim duration flow 4.2.5 Minor bug fixes 4.2.4 Minor fixes 4.2.3 Fixed TRM3 Lifeline bug 4.2.2 Fixed icon for Z-Smoke2 AC 4.2.1 Fixed Z-Temp3 setpoint 4.2.0 Added support for Z-Smoke2 4.0.8 Fixed 2 issues on TRM6 reported by @AxelS4.0.6 Changed… ---
**Author:** ![Can42](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/can42/32/36544_2.png) [@Can42](https://community.homey.app/u/Can42)\ **Post date:** [October 28, 2021, 4:25pm UTC](https://community.homey.app/t/heatit-z-trm3-lost-contact-with-homey-after-7-1-5/53880/3 "2021-10-28T16:25:17Z")
OK, not sure whether this is a Heatit or Homey issue. But I’ll try there as well. thx ---
**Author:** ![Strauman](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/strauman/32/33981_2.png) [@Strauman](https://community.homey.app/u/Strauman)\ **Post date:** [October 29, 2021, 5:23pm UTC](https://community.homey.app/t/heatit-z-trm3-lost-contact-with-homey-after-7-1-5/53880/4 "2021-10-29T17:23:59Z")
I seem to have the same issue 😕 ---
**Author:** ![HeatitControlsAB](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/heatitcontrolsab/32/43240_2.png) [@HeatitControlsAB](https://community.homey.app/u/HeatitControlsAB)\ **Post date:** [November 9, 2021, 2:38pm UTC](https://community.homey.app/t/heatit-z-trm3-lost-contact-with-homey-after-7-1-5/53880/5 "2021-11-09T14:38:33Z")
Hi, this is an app issue that arose after Homey updated to version 7.0.0. An update we are releasing will probably resolve this issue. ---
**Author:** ![Strauman](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/strauman/32/33981_2.png) [@Strauman](https://community.homey.app/u/Strauman)\ **Post date:** [November 10, 2021, 1:19pm UTC](https://community.homey.app/t/heatit-z-trm3-lost-contact-with-homey-after-7-1-5/53880/6 "2021-11-10T13:19:26Z")
Thank you so much for the information! ---
**Author:** ![Hans\_Petter\_Lande](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/hans_petter_lande/32/49088_2.png) [@Hans\_Petter\_Lande](https://community.homey.app/u/Hans_Petter_Lande)\ **Post date:** [December 18, 2021, 8:04pm UTC](https://community.homey.app/t/heatit-z-trm3-lost-contact-with-homey-after-7-1-5/53880/7 "2021-12-18T20:04:13Z")
Hi. I still have this issue with my 3 ztrm3 thermostats. Have you released the update? What is the newest version of the app? ---
**Author:** ![Can42](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/can42/32/36544_2.png) [@Can42](https://community.homey.app/u/Can42)\ **Post date:** [December 20, 2021, 8:07am UTC](https://community.homey.app/t/heatit-z-trm3-lost-contact-with-homey-after-7-1-5/53880/8 "2021-12-20T08:07:20Z")
I had to reinclude 2 of my z-trm3 and factory reset and reinclude a third one. But now they’re all working as normal. 👍 ---
**Author:** ![HeatitControlsAB](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/heatitcontrolsab/32/43240_2.png) [@HeatitControlsAB](https://community.homey.app/u/HeatitControlsAB)\ **Post date:** [December 27, 2021, 12:05pm UTC](https://community.homey.app/t/heatit-z-trm3-lost-contact-with-homey-after-7-1-5/53880/9 "2021-12-27T12:05:15Z")
Hi, There is an issue with S2 security on Homey. I suggest you reinclude the devices and when it asks for a dsk code you type 0 0 0 0 0 instead. ---
**Author:** ![jan\_smink](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jan_smink/32/55879_2.png) [@jan\_smink](https://community.homey.app/u/jan_smink)\ **Post date:** [August 6, 2022, 10:38am UTC](https://community.homey.app/t/heatit-z-trm3-lost-contact-with-homey-after-7-1-5/53880/10 "2022-08-06T10:38:59Z")
my Z-TRM3 also lost connectivity with Homey pro at some time… probably after the Homey update to version 8.03. trying to pair with the in-app instruction did not work… always ending with “ERR” on the thermostat. indeed after a factory reset (thanks for that tip) of the thermostat the pairing worked again… i had a Schwaiger zwave hub that had similar issues in the past. (after half a year it lost connectivity and never got it working after…). my suspicion is that the heat-it z-wave implementation is not very robust…