Installing Digital Thermostat to 4 Wire system


Junior Member
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.