Just tried the second t-stat. No batteries are installed...fresh out of the box. I pulled the first one (with battery-eating problem) off the wall and installed the second (same wire connections, same baseplate, just replaced the t-stat). It powers on! I haven't set up anything, yet, but that's good news so far!lonebrave said:I'll try installing the second t-stat in place of the one I'm having problems with. Hopefully that one functions correctly. If not, and it turns out there is a mfg defect, maybe it will help narrow down the bad batch.
I also pulled the batteries out of the first unit while it was off the wall and reinstalled it...nothing. I'm leaning towards a defective unit at this point. We'll see how the second unit functions after I get it programmed and running for a while.