Does this work with nest thermostats

Posted on Jun 17, 2023 12:29 PM

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Homekit and Honeywell T5+ Thermostat HomeKit is "Unable to Add Accessory; the setup code is incorrect" for my Honeywell T5+ thermostat, which was installed four years ago and which had previously operated properly as a HomeKit accessory. I had just noticed that this Accessory was not responding. I then deleted the Accessory from HomeKit, and reset "HomeKit" on the device, and rebooted my Residential Gateway and Router. All device OS's are up to date including the Matter upgrade. The Honeywell T5+ Thermostat vendor app and router dashboard shows the device properly connected to the WiFi network. All devices are on the same network. When attempting to add the accessory to HomeKit, the setup code, which is printed on the device product manual, is accepted via camera scan and the thermostat identity correctly appears. However, after selecting the thermostat identity icon, the warning "Unable to Add Accessory, the setup code is incorrect" appears with just an OK to dismiss. The setup code is, of course, identical to the code used previously with success. What must I do to add this accessory again to HomeKit?
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1 reply

lkrupp

Level 7

23,821 points

Jun 17, 2023 2:35 PM in response to DJF405

The answer is yes for Nest thermostats 2020 and later, plus iOS 16.4. Nest requires a firmware update.

https://www.macrumors.com/2023/04/18/nest-thermostat-homekit-support-via-matter/

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Does this work with nest thermostats

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