Hi all, I'm hoping this is a simple one. My mom has an early 1970s mobile home she rents out. The living room has 2 baseboards for electric heat controlled by a single thermostat. The tenant said that sometimes it doesn't shut off, or let's it get way warmer than it should before it shuts off so I want to replace the t-stat. The old one is a federal something or other brand. Square with the dial. It's on a double 30amp breaker (so 240v). I switched off the breaker and took the t-stat off the wall to have a look. In looking at new ones (I'm hoping they're about the same size and I can just use the same junction box that this is all mounted in and not have to cut paneling etc) for sale at Home Depot for example, I'm confused. I assume I need a "4 wire" because of the 240v but not sure how it would wire up. In the current world, I have a line in and a line out. One black to line, one to load (makes sense). Then the two whites are pigtailed with a single white to the t-stat and then the 2 grounds are pigtailed to a copper that goes to the ground screw on the t-stat. That being said, what kind do I need to replace and how does it get wired up? I'm looking at some Honeywells and seeing 2 black and 2 reds on the diagrams. thanks!