The transformer has instructions for connecting with a thermostat. The only hard part was fishing the wires behind the wall from the outlet to the thermostat. I was lucky that my outlet was only 3 feet away. If you don’t think you can do that, you could run the wires outside the wall (doesn’t look good) or hire a handy person to help you. I would hate to hire a HVAC expert or electrician to do this simple job.
My solution was to just power cycle the whole furnace. I have a propane furnace which runs on 110V. I replaced the hard-wired connection with a plug and use a smart outlet that can be controlled remotely.
Once again, I’ll wonder out loud if ANYBODY is actually DOING ANYTHING with these logs we have been submitting. Mine have been solid for a long time and suddenly one of them is dropping offline about once a week.
As a comparison to mine, I have firmware1.2.8 and plugin version 3.0. I only had problem once since it was installed on 9/23. I took off wall then deleted and added back on like it was new. My settings did come back in automatically.
Glad to know that your experience is very different from everyone else in this thread. As has been said here many times, there is nothing any of us can do to resolve this issue. It is a weakness in the Wyze firmware, the underlying hardware or both. When the thermostat loses its session with the cloud servers, it does not attempt to reconnect. It just sits there offline until it is restarted. Only Wyze can correct this issue and they have ignored it for going on four years now.
Landed here after, of course, loosing connectivity to my Wyze thermostat. Hoping this note may save future us some time.
I could always see the thermostat in network, device always had ‘strong’ signal. I could also ping it.
However, like everyone here, I couldn’t load UI on browser… Smells like IP conflict. A few other devices were ‘off’ as well; unavailable to log into.
From my devices list on router, I could see each device’s MAC Address and IP. I just took thermostat out of DHCP addressing and manually assigned it the IP it had attached to in the first place.
Voila, device back. I then circled back and did all the other (2) devices that were also off, a garage door and a backup server. This all happened just a little bit after I had extended guest stay at my house; I suspect and IP grab shuffle from some rouge device of theirs.
I installed a WYZE Thermostat at my recreational property in January 2025. I thought it would be nice to monitor the furnace from my home and turn the heat up before heading there.
Unfortunately, every time I returned home I got the “Device Offline” message. I had a workaround to remotely reboot the modem at the recreational property that restored connectivity 90% of the time. For the other 10%, when I returned to the recreational property I had to pull the thermostat off the wall and plug it back in.
Note that while “Offline”:
the thermostat continued to work and maintain the heat.
showed as ‘connected’ to Wi-Fi in my modem management screen
showed as ‘disconnected’ in the WYZE app Thermostat Device Info screen.
In June I contacted WYZE Support. They were very responsive and after exchanging a couple of emails with suggestions on changing settings (which I had already tried) they sent me a new thermostat.
Unfortunately, the new thermostat also gave the “Device Offline” message when I returned home.
In July I installed an Ecobee thermostat at my recreational property and so far it has remained online during the 3 times I returned home.
I then installed the WYZE thermostat at my home. I have been at my recreational property for the last 2 weeks and the WYZE thermostat has remained Online!
When the WYZE Thermostat was installed at my recreational property, I cannot explain why it stayed Online when we were present and only went Offline when we left. WYZE Support suggested that it may be related to “Auto Switch” - but this was turned OFF, plus it works fine when installed at my home and we are away.
My conclusion is that the WYZE thermostat is not compatible with the slower internet service at my recreational property, where I have a 25 Mbps LTE based service with high latency (>20ms ping).
Also, I have 4 OG cameras at my recreational property and they connect to the WYZE servers whether we are on site or away. The cameras must use different network software/hardware.
The Ecobee thermostat connects on the 5GHz band and maybe this helps it maintain a connection to the Ecobee servers on a high latency internet connection.
At home I have a 1.5G fiber internet service with low latency (<10ms ping) which I assume allows the WYZE thermostat to maintain a connection with the WYZE servers.
Yep, you’ve hit on what several of us in this thread believe to be the issue. Latency causes the connection from the thermostat to the Wyze cloud to hiccup and the thermostat doesn’t attempt to restore the connection. So the thermostat sits there forever offline until you reboot it … I mean kill the power and force a restart. No other Wyze device I own has this issue.