How To Reset Sensi Smart Thermostat ST 55 & Set It Up

In this video we teach you how to factory reset your Sensi ST 55 Smart Thermostat, and how to set up your Sensi Smart Thermostat ST 55.

To Factory Reset the Sensi Smart Thermostat ST55 or Sensi ST 55 Smart Thermostat you need to remove the batteries from the smart thermostat for 2 minutes. Then reinsert the batteries. To Remove the batteries and reset the Sensi ST55 you need to pull the Sensi Smart Thermostat off of its mount by pulling forwards on the device and removing it from the mount. This will then give you access to the Sensi Smart Thermostat and Sensi Thermostat batteries.

If you are having issues getting your Sensi Smart Thermostat reset try using new batteries when reinstalling them in the device.

How To Reset Sensi Smart Thermostat ST55
1. Remove the thermostat from wall.
2. Remove the batteries for 2 minutes then reinstall the batteries.
3. Replace the Sensi ST 55 Smart Thermostat which has now been factory reset.

How To Set Up Sensi Smart Thermostat ST55
1. Once the device has been factory reset it can then be set back up. If you are having issues getting the Sensi Smart Thermostat set up. Try using fresh batteries when you replace them during the reset process.
2. With the device powered up, click on the menu button.
3. Then Click the "Mode Button" which will enable the the wifi and connecting the Sensi Wifi Smart Thermostat.
4. Download and login to the Sensi app and follow the instructions to connect your Sensi ST55 wifi smart thermostat.

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[SpicySnax]

Thank you so much for this. When this was installed in the house we were never told it was Wifi capable and at the time we didn't really need the wifi setting. But taking care of someone with progressing dementia she became very obsessive about the thermostat. Changing the temperature without us seeing and I was thinking i needed to look into a lock box or a new display. This is such a life saver to be able to control it from my phone and lock the display that way. Appreciate this vid!

[jodyhorberg]

A BIG THANKS!!! I finally got mine to reset and transfer account to new phone!! I have tried for a couple of months to figure it out but apparently I was missing a step... THANK YOU SO MUCH!!

[steveaaa]

Thanks a bunch, just moved into new house and could not figure out why I did not see the wifi icon top left. Got it connected to wifi after seeing this utube.

[veronicaruiz-archer]

Thank you very much 🙂🙏🏼, my partner didn’t want to mess with it but I watched your video and patiently tried it all and then got it to work as it was locked by previous owners.

[robineaddy]

This was reslly helpful. Thank you so very much.

[samie]

To reset it to factory setting, instead of removing its batteries and wait for a couple of minutes, we could also press and hold the Up and Down arrows and the Fan switch (all three) simultaneously for a few second.

[blightniak]

hard reset the thermostat by pressing and holding arrow up, down and fan button until the screen goes completely blank with one black line at the top

[ashleybui]

Thanks a lot, I got successful to reset my thermostat.

[tracyurueta]

I reset my thermostat but it still won't allow me to put it in heat mode and I'm desperately trying to figure out why😢

[nimo_]

Will this thermostat need to be reset everytime the batteries die? Just wondering

[kendrickjr]

Up arrow and menu button resets it if its locked. You have to wait for the lock icon to stop flashing and unit clicks to turn on.

[michillekrantz]

What is the auxiliary heat setting on the thermostat?

[barch]

how do i reset if buttons were locked in the app? Fan and up down will not work. Batteries up down won't work. Thermostat is not connected in app to unlock

[KaHaDa_life]

Can't connect the app to thermostat, android 14, the app connects to the WiFi of the thermostat but can't go any further can't press next to complete setup

[PritiGoel]

I tried everything twice but it still comes back to old setting and atill locked

[frankjones]

Have you had any issues using the fan circulation percentage feature? Just installed this and it doesn't seem to be working. Also can't believe this thermostat doesn't have programmable fan (just venting).

[blightniak]

The factory reset did not work, I changed my thermostat to Celsius, removed the batteries for 10 mins then reinstalled and it's still in Celsius, reconnected to wiring and I can still control with my phone. How do you do a factory reset?

[brittanymichele]

What if it's locked?? I tried this, didn't work, lockpad kept flashing at me. I tried holding all the right buttons down as well.

[BrettHalliday-ke]

I have one of these, the temperature is off by 23 degrees compared to my old thermostat.

[chrisreynolds]

Once I connect to the thermostat on the wifi in my phone and I go back to the app, I can't click next. It doesn't do anything. I also don't get the wifi symbol before entering radio mode like yours did.