Done!
Put mine in yesterday. 2019 MHC with trash Dometic thermostat. Wiring wasn’t exactly as per instruction pictures but was figured out without too much effort. App install and software update were quick. Put it through all its paces and it worked flawlessly. Make sure you order the right one— I needed the one-zone 351 instead of the 350 multizone recommended in this thread. There is a link on the MicroAir web site to help you choose the right one. Here’s a picture of my wiring before. Just remember green is normally ground on both old and new thermostats and you can figure the rest out.
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