Good Day to you all. First of all thank you for looking at my post. After much research I fell like I need to start a new post to get some advice. I have a 2015 Reflection by Grand Design 5th. Wheeler that has a basic Atwood Thermostat, and I would like to install a new Honeywell WIFI Digital thermostat in it's place. There are just 4 wires coming out of the Thermostat right now. (Black red White & Yellow) Can someone please let me know what I need to do for basic installation, and so I can still control the fan for the AC? Thank you very much.