I have a JohnsonControls thermostat that appears to me to be something like (https://www.supplyhouse.com/Johnson-...old-separately) with a cover (https://hdsupplysolutions.com/shop/p...-cover-p290173) that is stuck pushing some heat into the house. I've attached some pictures and it looks like I have to pop this area off with a tool to remove the cover. Once I've done that, how can I turn it off? Also, any recommendations for a replacement thermostat?