I only purchased this thermostat as my ~15 year old thermostat dropped support, hence no more remote control. This one does what it’s supposed to do with many caveats: - display is constantly brightly lit, which shines annoyingly into the bedroom from the hallway. I’m looking for some dimming film to put over it. The old thermostat only lit when you touched it which makes more sense and uses less power.
- thermostat attempts to maintain the exact temperature but this results in too much cycling of the air conditioner which increases wear. The old thermostat had a two degree variance allowed which meant it would only kick in when the temp varied by 3 degrees which was barely felt. This should be a customer setting.
- the “c” wire adapter included is a wasted expense if you don’t need it, and most systems don’t so it’s just landfill material now.
- this model comes with one additional remote sensor which in theory would allow you to target different priority for different rooms. However in practice it’s hard to see it’s usefulness. It can’t be used for zone control, you have to buy a whole separate thermostat for that. Also it attempts to be “smart” by either averaging between one or more sensors and the main thermostat itself, or prioritizing based on where it detects motion. So this means you could prioritize the master bedroom at night and it would manage set temperature for that room, which would be good but since it's motion triggered, it wouldn't do anything while you're asleep. Also, you can't have a separate set point for the remote(s) sensors, only the main thermostat.
- The app only shows the actual temp at the thermostat, not the remotes ones without going three menu's deeper.
- the app shows how many hours your system runs, but only total per day. My old thermostat showed by hour which was much more useful. It also showed it via graph with the outside temp also graphed alongside it. Again, way more useful.
- The app also allows 'geofencing' whereby when your phone senses you have left your property. A good idea but in practice not very practical. It should only work if 'all' who live in the house have the app and all are tracked as away. Else the one person who turns it on changes it for everyone.
*most* of these issues could be solved with software updates to either the app, thermostat, sensors or all three. I have a Tesla which gets updates on the average of every couple of weeks, and is constantly improving. Unfortunately I have little confidence any of the software will ever get updated by Honeywell for their products especially since there are no instructions on how to do this for this T9 model on their website as there are for other models.
Bought this thermostat because of its auto mode capability. During seasonal weather it will automatically shift from cooling to heat so we wake up to comfortable temps. Replacement instructions were very simple and easy to replace the old thermostat. App was easy to install and understand and now can control home temp from my phone. I would recommend this device to friends and family.
Very easy to install and use! The name change from Honeywell to Resideo threw me off since i had never heard of "Resideo" and was concerned downloading the software, but after a quick web search, found out it was legit. I have not had any issies with the T9 at all and highly recommend!
This thermostat was easy to set up. Having a second sensor for the master bedroom is a great feature. And I'm learning more as I go, setting up schedules that balance the room temps the way I want them to. Good product.
This will be our third Honeywell smart thermostat that we have had. The original that we had years ago was the Lyric Round and it stopped working, so we purchased a Smart Color, which is a great thermostat as well and very easy to use. Nothing was wrong with that, but decided to upgrade to the T9 with remote sensor, so we could put one on our second story. It has been a great benefit to having the sensor to help balance the temperature in the house in the geofencing is a great feature as well.