I'm just getting into SL's through a friend of mine who is toying with one. We were replacing the blower motor when we ran across a probe of some type that we had to remove in order to replace the blower fan assembly.

This was right in the middle of the box that holds the blower assembly, up high and to the front of the box. It is held in by two screws. It has an electrical connection to it. And it has no part number anywhere.

What is this thing? Some sort of temp probe for the climate control?