Works with Ring App. But you can only adjust the temperature and can not make a schedule on Ring App. You would have to use Honeywell Home to set up a schedule. I did routines on Alexa to set temperature at certain degrees when Ring Alarm is Away, Home or Disarmed. It was easy to set up. Looks nice on wall. Can adjust brightness of screen. I’m using one sensor. I did not feel need to get additional since you can not set certain temperature for a certain room. What the system does is averages the temperature set on thermostat with rooms containing sensors. You can not set individual temperature per sensor.
I installed this 4 days ago. Installation was easy as I had an unused C wire on my existing old, round, dumb Honeywell thermostat. I also had no problems connecting to the internet or using the app.
I have two issues with the unit. First of all, the display temperature will round to the set temperature when they are within +- 1.5 apart meaning that it always appears that the room temperature is equal to the set temperature when the unit is not off. This is very misleading since it does not represent the actual room temperature the unit is using to turn on/off.
The second gripe I have with the unit is that the user cannot control the temperature differential. I am not sure if this thermostat uses 1 or 1.5. Regardless, my AC was running less than 10 minutes most of the time and coming on in 10 minutes. There were times that the unit came on for less than 1 minute (not even sure why this was). Short cycling is not good for HVAC equipment.
Between the inaccurate room temperature display and the short cycling, I have uninstalled this unit and installed a smart thermostat from a different manufacturer. I was able to set the differential manually. Now my AC will run for 13-15 minutes and go off for about 20 minutes. In addition, the replacement unit has a compressor minimum run time default of 5 minutes which eliminates short cycling. It also has a feature to let the fan run a little longer after the end of the cycle to dissipate any air left in the duct.
It’s a no brainer that the T9 is not worth the money.
No, I would not recommend this to a friend.
Response from resideo.comBy Support, September 21, 2021
Hi, this is not something you should expect and we apologize for the experience. We're here to help if you need assistance in the future - just visit our Support Center link at the top of the page to find ways to contact us. -Joey
I had bought a Nest unit but absolutely hated the rotary dial to access menus. That said, this is my first WiFi thermostat; I've had it for several weeks and I love it. The ability to control it away from home, even just from another room is such a convenience. Another big plus too is having a PIN lock it so others can't fuss with it. The screen has really nice contrast and dimming is controllable. Numbers are large and legible from a good distance. The app is basic and straight forward, however adding the ability to change or disable the thermostat PIN from the app would be a nice feature. Overall, I'm very pleased with this!
Easy to install, set up and operate. Display is crisp and clear. My wife and I both found the on-device menus very intuitive to use. Pairing and App are straight-forward. Works with both 2.4GHz and 5GHz wifi. We set the display backlight to 10% for day and night - for subtle but still clear screen illumination. Recommended overall.
The T9 thermostat is working well. I could have given more stars for the unit itself but the Android apps "Honeywell Home" stops me from doing it. It is not user-friendly and not much settings i can do through the app. The worst is the first screen which shows the current temperature with huge font size but with TINY font size for the preset-temperature. I have to wear my reading glasses everytime if I want to override the preset. It is difficult to distinguish between ##.0 and ##.5. The difference between Huge and Tiny font size is totally unnecessary. Please see attached picture (1:1 scale)