So I recently purchased and installed a Nest E to replace my TopTech W955WH thermostat (our gas company was offering discounts and this is the last “smart” device that we have left to replace in our home). My furnace and A/C worked perfectly before: heat heated the house and A/C ran nice and cool. Our TopTech thermostat was powered by a black and red wire that was fed off of our furnace’s main board but in our basement we had a Pro1 Base Module hooked up with the actual thermostat colored wires that transmitted signals wirelessly to the actual TopTech thermostat in our living room. I knew that I couldn’t power my Nest E with the black and red wire so I ran a new thermostat wire down from the thermostat was in the living room to the furnace main board. I wired the furnace board the exact same as it was prior and when the Nest E was installed I wired it using the wire diagram that Nest had provided over customer service chat. The Nest E worked fine as far as it’s actual functionalities, no errors or anything, but when it was turned on “Cool” the furnace fan would turn on but the outside A/C unit would not. With heat, the furnace fan would turn on and then the heat would turn on as well, as it did prior to the Nest. Nest sent a replacement Nest E and before I go ahead on touch this new unit I figured I would ask the internet for help.
Also, we had a humidifier that we disconnected due to the unit being broken. The red and white wires coming from the brown sleeves are for that unit.
Original furnace main board wiring: https://imgur.com/Wu5yVIr
Wireless module wiring: https://imgur.com/yyPqVOe
New furnace board wiring after installing new wire (no dehumidifier anymore) https://imgur.com/g92qRUY
How Nest wanted me to wire up the Nest E (works with heat, no A/C) https://imgur.com/WYdbyY5