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?
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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.
Doable, make a note of where the wires connect, unscrew them and unscrew it off the wall. Hopefully you have a little slack for something new.
You need to understand what voltage if any is coming from the wall. That will impact your replacement choices. Smart wall stats generally expect power.
I put a Moes Zigbee stat on last year which is connected to three wires (live neutral switched).