Honeywell THP2400A1027W White Coverplate Assembly by Honeywell

I had to change my thermostat in my condo since it wasn't working and when I pulled off the old one I noticed that the wiring was connected to an electrical box and not just threaded through a hole. I was stumped on how to put my new one on as it's a totally different size. Looked on youtube and there was a mention of using electrical wall plates, great idea! So I went and got a couple and noticed that while it worked it wasn't visibly pleasing to look at since the screw were showing and the thermostat wasn't securely held. So, looking in amazon I noticed this honeywell plate, crossing my fingers that it would fit my new one. Yes, it's a little pricey for just plastic but it comes with 2 sizes of wall plates and mounting bracket for the electrical box. Seriously took 5 mins to get everything installed and looks good.

I have had a honeywell programmable thermostat for about 10 years now..it served me well and replaced an old mercury White-Rodgers thermostat. That old thermostat was huge but luckily the Honeywell thermostat was pretty big too..fast forward 10 years and Santa dropped off a Honeywell Smart thermostat (RTH9585WF1004) for me..I was shocked at how small it was when I opened the box..pictures made it look bigger. So after mounting the thermostat it bothered me to see the other old mounting holes and mismatched paint. I did a Google search to see what my options were and came across people mentioning a coverplate. A quickly search on Amazon led me here. Of course it didn't mention my model thermostat but it looked like the right size but luckily the other reviews calmed my doubts. My only gripe is that I can't seem to find the grey version. Nothing wrong with white but I feel like grey would've looked better. Nonetheless the package comes with two sizes. For me the small was big enough to cover the old paint and mountings holes but the other bigger plate should cover all but the most extreme cases. Nonetheless great cover. If you're in doubt about what lies under your old thermostat I would go ahead and order this along with your smart thermostat. Better to have it than not have it because if you end up needing it that means ordering it, waiting on it and then installing it which means cutting the power, yanking the newly installed thermostat back off the wall, unhooking all the wires and unscrewing the mounting plate and then adding the coverplate, lining up the mounting plate on the coverplate and reattaching everything. Not a hard job but more work than necessary when you can just add the plate when you install your new thermostat the first time. Even if it isn't needed it looks good. I'm not sure why it isn't included in the box with the thermostat. I believe the T series thermostats come with coverplates so come on Honeywell throw them in the box for ALL of your smart thermostats. Ignore the anchors in my pic. Those are the remnants of a locking thermostat cover that was installed with the old mercury thermostat. Nothing would cover those since the cover was so big. But all the other imperfections and mismatches paint were covered perfectly by the coverplate making it all look neater even with the remaining anchors showing

Order this BEFORE you plan to install your thermostat. Saves a lot of trouble, plus if you determine you don't actually need the back plate(s), you can return them unopened. Mine turned out to be needed, fit great, and our electrician was happy to put it into place before wiring the new item.

This Thermostat cover, helps installing the Honeywell Thermostat on a standard electric box. It has two white plates that easily masks the wall imperfections after removing the original device. No need for painting.

Work as designed but kind of pricey for what you get.