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We recently installed a split system with 4 indoor units, and added 4 honeywell wifi thermostats for remote temperature control. I then wanted to connect the thermostats to Google Home app. but I found out that no matter what I don, only one of the 4 thermostats is visible to Google Home app. Is there something I can do to make all 4 thermostats visible in the Google Home app?

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  • Do you need to set the names on the 'stats so they are different?
    – Solar Mike
    Jan 17, 2021 at 10:13
  • The thermostats all have different names.
    – filmil
    Jan 21, 2021 at 7:49

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Two things happened since I posted the question.

  1. A few months after the post, the thermostats suddenly all started appearing in the integration.
  2. Sadly it turns out that the Honeywell thermostats don't really work: they don't measure the temperature reliably, nor do they control the AC reliably. Digging a bit deeper found dozens of people complaining of the thermostats not working.

I ended up throwing the Honeywell smart thermostats away and buying Cielo devices instead. They work much more reliably and predictably. With that, the issue went away.

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  • Are you sure they were real Honeywell thermostats and not cheap knock offs from China? I'm intimately familiar with Honeywell thermostats and how they develop and test them...Honeywell doesn't produce garbage. Sep 29, 2021 at 11:59
  • Their serial numbers check out and the devices take firmware updates from Honeywell. I think this is about as sure as one can get.
    – filmil
    Sep 30, 2021 at 1:12

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