TH6320WF2003/U Lyric T6 Thermostat, 3 Heat / 2 Cool Heat Pump Or 2 Heat / 2 Cool Conventional, 4.09" x 4.09" x 1.06"

I just got two of these so no idea if it's durable. I replaced two old T4 units with two T6 Pro units. The pin structure between T4 and T6 Pro is identical so I just pulled the old one off the wall, popped the new one on and it fired up immediately. I programmed both units into Resideo seamlessly. I had everything up and running, completely programmed in 15 minutes.

Great Thermostat!

I live in an apartment, and there was a honeywell thermostat here before that was not smart. I just replaced it with this one and configured the settings quickly. If the temperature sensor doesn't line up its probably cause you hit 10k and not 20k. Try a few ways around. But for the most part this was straight forward. You do not need a professional if the wiring is already configured from the non smart version. It was a simple replace the head and go about your day. I did setup the c wire bc whoever installed it last didn't bother to use it. But this unit requires it. If you don't have a c wire, make sure to get the battery version.

We’ve used the Honeywell TH6320WF2003 thermostat along with the Honeywell remote indoor sensor in multiple buildings, and it has been an excellent choice. The Wi-Fi connectivity and the ability to use a remote wired sensor in another room make it incredibly versatile. We typically install the thermostat in the basement and place the sensor in a tenant’s apartment, allowing us to monitor temperatures remotely. This helps us detect potential issues before tenants even report them. Additionally, the system has been highly reliable and performs consistently well.

April 26, 2023 Update: After Oct 20, 2022 update at bottom, I purchased a Google Nest from Amazon on Oct 21, 2022. Google Nest is amazing and so disappointed with myself that I even tried to work with Honeywell / Resideo. In Jan 2023, I purchased two more Google Nests via Georgia Power, for a 2nd house and am VERY HAPPY with all three Google Nests. I have some indication that Honeywell / Resideo has now changed to using Google Nest APP and maybe even the electronics but can't be sure. As a bonus, Google Nest provides real time updates of run time, Honeywell run time data was never available until two days later. The switching from Heat to AC every time my phone left the house, even though all forms of scheduling and Geo Fence were disabled, was the final straw. ~~~~~~ Original Review followed by updates below ~~~~~~~~ Although Honeywell claims compatibility with the Apple Home Kit App, Honeywell Tech support tells you to call Apple. Consequently, I uninstalled Apple HomeKit App as I did not believe the problems experienced were related to the Apple HomeKit App. The problems continued with only the Honeywell Home App installed. No matter what I did, temperature setbacks occur shortly after I leave home even though I had geofencing set for 300 miles. Consequently, I had to disable Geofence and resort to using the vacation mode. With the Vacation Mode, you have to set a start and end date which is adjusted by day and my need is to have it remain in “Vacation Mode” to some unknown date in the future as I have two residences. I called Honeywell Support twice prior to purchase and received conflicting information. After installing, I called at least three times reporting the above problems. I then requested a replacement from Amazon which had the same problems and called Tech Support for the fourth time. On July 28, I called Honeywell Tech Support for the 5th time and problem was supposed to be escalated with a return call on July 29. Since the return call did not happen, I am posting this review. I am an electrical process control engineer and do not need tech support if a product works. The firmware level has remained the same for the four months that I have had this product so Honeywell is not interested in resolution of known problems. Update (Aug 2, 2021): After a couple days in the “Vacation Mode” Honeywell TH6320WF2300 (T5) thermostat turned “Vacation Mode” off even though it was set to stay in Vacation Mode for the next two months. I will now have to disable “Schedule” which disables all scheduling functions including the previously disabled “Geofence”. This thermostat may appear to be great but you will soon learn that it is not controlling the temperature as expected. I will now set it manually to the temperature desired for summer and reset for winter when the time comes. Very poor 10% design! Update (Nov 3, 2021): Marginally works if you don't use anything but the most basic features. However, when I launch v5.8 of the APP, it displays the temperature from the last time I launched. I then have to change to a different menu option and then return at which time it updates the room temp and outdoor temp. Shame on you Honeywell! Update (July 21, 2022): One thing I discovered is that the thermostat keeps track of run time for heat and cool independently by day, week, month or year. On my thermostat installed in 2021, I now have run time data available for part of 2021 and 2022. One limitation is that the newest data is two days old. On June 1, 2022, I received email that the APP icon and name of settings would change from Honeywell to Resideo starting June 22. My APP changed on June 28. Since that time, the thermostat won't keep the manual settings and changes to settings contained in the Schedule which is disabled. This has made the thermostat GARBAGE unless fixed. I have called support four times between July 7 and July 21 with no help so far. The voice greetings assure customers that functionality would not change, just the name. However, it did change. As of July 21, 2022, whenever one opens the APP, it warns "PERFORMANCE ISSUES" but assures users they can still use the manual controls without the WiFi but does not disable the APP from making changes. The simple solution is for Resideo to restore the firmware and APP to that used prior to the change from Honeywell to Resideo on or after June 22, 2022. Update (Oct 20, 2022): Honeywell / Resideo auto firmware update broke my thermostat when icon changed from Honeywell to Resideo as advised on June 22 but didn’t update until I returned home on June 28, 2022. Every time I left home this summer it changed the set point even if I disabled Resideo Wi- Fi tracking of my iPhone. Now that I have changed from Cooling to Heating, thermostat is now auto changing from Heating mode to Cooling when I leave home. This is a disaster as temperature can drop to 25 below zero and furnace will not heat when thermostat is in the “Cooling Mode”. This is unacceptable because I leave for months at a time. I configured the thermostat for manual changes only but there is nothing I can do to prevent the erratic and malicious firmware installed without my consent and nothing I can do to return to previous firmware and /or disable all future firmware updates. There is no physical address on the Resideo web site. Resideo has now changed support to banker’s hours. After 3.5 months on the current problem, On Oct 12, Resideo had the gall to send me a survey as to how satisfied I am. Since completing, Resideo has not responded to my very negative review of their sorry, sorry support. This is the second piece of equipment purchased from Amazon where vendor has destroyed my purchase with a firmware update to force Amazon customers to purchase a replacement. Amazon management has my permission to refer to Resideo Case #09064201 and many calls before regarding this Honeywell / Resideo product.

Very easy to install if you have any other T6 thermostat. The install programming however unfortunately requires quite a bit of knowledge on specific details regarding HVAC systems. Had to hire a professional

Would recommend

Great product. Work as promised. Can control temperature from anywhere in the world. Software application is easy to use.