Homekit: Accessory Already Added Issue?

I had the pleasure of racking my brain for an hour or two, trying to add my devices back into homekit after changing my wifi password to a stronger, more secure password.

In my attempt to connect my Sensi Touch Thermostat to Homekit, I either got Device Already Added, or Device Could Not be Added.

In order to resolve this, I had to Factory Reset the Thermostat using this sequence.

Menu > About > Factory Reset

Hope that helps everyone who is having issues adding their Sensi Touch Thermostat back into Homekit.

This situation also occurs with Leviton Gen2 dimmers and switches. Home Kit App indicates the accessory is “already added” but it does not appear in the Home accessories list and cannot be controlled by Home/Siri. Apple Support seem clueless on this issue. But it has clearly been a problem for many months.

I saw exactly what you described @joeyfatone. The August app would never get to the part about scanning the code, and would instead timeout and say there were no devices. HomeKit would scan but say the accessory had already been added.

Thanks so much for your posts - and for yours too @grhodson. At least there is a path forward.

Having the same Issue with an August smart lock I installed yesterday. Went through the pain of deleting my home and everything. I was able to add every accessory back except the smart lock..Not sure if there is a resolution but it’s very annoying!

Well here we are 25 days later and no replacement module. Multiple calls to Yale and I have now been told that they were out of modules and miracle of miracles they just came in and they will send one today.

I have not tried playing with it again - but having read some of the more recent posts, I may try one more time while I am waiting for a module.

Exactly the same issue with the Sensi/Emerson touch thermostat. Just won't re-add itself to Home kit, no matter what - have reset and re-added it several times to the Sensi App. I don't want to create a new home because I have many 40 devices connected to Home Kit, and a ton of custom schedules for art lights, blinds etc. Two of the other Sensi/Emerson thermostats in my unit (there are three) are working just fine with Home Kit.

My daughter in her home, and I in my home, have the same issue. We are both reluctant to recreate new homes because of the number of other devices. Also, I am reluctant to factory reset my Sensi because of my heat pump settings. All other devices work fine. Our software is at current releases.

Same issue here. with my Emerson Sensi Touch thermostat. Tried setting up a new Home and still got the same message "Thermostat Already Added To Home" Thermostat works fine on Sensi app. Just no longer shows on Home. I am pretty sure this is an issue with Homekit.

Is there a way to reset the ecobee to factory default?

Try this:

From the Home screen, press Menu.

Select Settings.

Go to Reset.

Choose Reset All Settings then confirm your selection by pressing Yes.

Choose the reset option that suits your needs: ... 

The ecobee thermostat will be reset to factory defaults.

I grabbed that off the web from a google search. Not sure how helpful it is.

Hope that helps.

Not sure. From my experience, these are pieces of hardware that uses software to configure them. If something happens with the software piece, such as the device locked up, from a device perspective, it got added, however, your software doesn’t see it.

Same problem , I bought Sensibro air conditional control app , I found some issue on device under Home, I removed it and try to reinstall it again , I can’t ~ it keep saying already installed can’t install again under home . Assume Apple Home issue , any plan to fix this issue ?

Please help!!

I still haven’t found a solution, but I’m hoping if enough of us are having this issue that apple will help :(

Ugh that’s annoying, but at least it’s an answer. Appreciate your following up and adding info even after you got your own resolution!