Just posting in case it helps someone else with this simple thing I overlooked.

In Spring I noticed that my Air Conditioning was not working (blowing warm air). It was the auxiliary fan as I learned that it would be from this board. In my case the auxiliary fan was just unplugged due to some work that happened over the winter (I forgot to plug it back in after doing the Oil Filter Housing gasket replacement). Plugged it back in and now AC works great!

There are two plugs for the auxiliary fan on the passenger side of the vehicle by the radiator fan.