Honeywell TH6320ZW2003 T6 Pro Series Z-Wave Stat Thermostat &, Smart Home

Good, versatile Z-Wave thermostat
I just installed the new TH6320ZW2003 thermostat, and (so far, at least!) I’m delighted with it. It looks nice and does what it’s supposed to do. Installation was straight forward.I did have to run a new 6 conductor cable and wire it both to the furnace and the thermostat, but that’s not very complicated if you understand how it works. Wiring at the thermostat was made easy by the nice push-in, spring clamp termination block.I had no trouble connecting Z-Wave to my Hubitat C7 hub. After downloading a driver, it all worked as expected.As with many connected thermostats, the regular programming (5+2 days; wake, leave, return, sleep) is disabled when you enable Z-Wave. They seem to think you want your hub to become the temperature control system. If that’s what you want – fine. But I just wanted a nice, programmable thermostat I could override via Z-Wave for instance when we are out of town. This one provides for that! While the main 5+2 x 4 schedule is disabled when Z-Wave is enabled, a simpler 5+2, wake + sleep schedule can be enabled if you dig thru the menus. That works fine for us. I had to read the manual before I purchased it to be convinced that was the case.Some commenters have complained they received a used device. While the box was slightly dinged, it was clearly still sealed, and the device was new. Others complained that there was another company’s logo on the front. I handled it quite a bit during installation, and only noticed the other logo after it was installed and I was admiring it. The logo is quite understated, and unless I was looking for something to complain about, doesn’t offend me at all.Another reported worry is that the heat relay sometimes fails closed (“on”), leaving the heat running continuously – a very bad thing. So far, it works fine. If it fails later, I’ll update this review. Another is that warranty is only honored if it’s installed by a professional (thus the ‘Pro’ designation). I’m not a contractor, so I’ll be on my own if it fails. But at least thanks to the other commenters, I know that.While it may not be a good fit for everyone, overall, it does just what I wanted, and I’m very happy with it.

Internal relay failed. Honeywell will not honor warranty.
After having issues with this thermostat (keeping the heat on and then not turning the heat off), I realized that the internal relay was malfunctioning. It got to the point where I could never hear the click of the relay. It seems to be stuck. Since it’s winter and below freezing every day, I had to replace it immediately. I spoke to Honeywell claims and they will not honor their warranty if purchased from Amazon.When it worked, it worked flawlessly, it joined the Z-Wave network just fine and works in Home Assistant. If you get this thermostat to replace an older working thermostat, be sure to keep the old one in a box, just in case.My other thermostat is a Go Control. It’s solid and also works over Z-Wave. Get that if you need a simple Z-wave thermostat.

This product works amazingly well with Home Assistant. One caveat, the zwave when on battery power (no C wire) goes to sleep. The fix was easy, send a command to the T6, wait 5 seconds and send again. the first command is ignored but does wake up the zwave. the second command is acted upon. At least through a lot of experimentation this is what I found. It only matters if there is a significant delay between sending commands that the zwave goes to sleep. This solution has worked 100% of the time!!!

This has all the features that you would need in a zwave thermostat. pairing is very easy and the connection is solid. It has auto mode as well but needs to be enabled but going to menu 300 in settings.