Our original 1990’s Honeywell Thermostat is circling the drain. Looking to replace with a new smart thermostat. Here is what it looks like with the cover off. Doable for a mid DIY guy like me or not?
If you have the C wire that others have mentioned and you liked your Honeywell… I have had a couple of the TH9320WF5003 for about 10 years and they are great. I had one of the Lyric T5s as well, but like the 9320 so much better. Nice screen, nice app and integrates well into Home Assistant.
What makes you think that thermostat is going to fail? It’s about as simple a device as you can imagine and doesn’t really have any parts that wear out.
Do you really need a smart thermostat, or just something programmable? A programmable thermostat works for most people, unless you have schedules that vary wildly week to week you probably won’t see much if any benefit from a “smart” stat.
Toss it and get an ECHOBEE