Okay, so I got the part number, and it turns out it's the evaporator temp switch, also known as the "de-ice switch" because it kicks the compressor off if the evaporator is froze/too cold to prevent the compressor from killing itself.

I'm actually leaving for Indy in a little bit, but once I get back I'm going to pull the amplifier and see if that also might need replacing, otherwise it's the evap. temp switch that I'm looking for. Fastlane has it, but here is the part number anyways: 003-820-24-10.

Thanks guys!