Help me ID this Disconnected Part
 

What is this that is disconnected?

http://forums.pelicanparts.com/uploa...1299724765.jpg

http://forums.pelicanparts.com/uploa...1299724770.jpg

I think it is the freeze sensor for the evaporator for the air conditioner.

If you remove it, it will have a long thin probe attached/

PET illustration 813-30 pos 35A, Temperature switch 928 613 133 00

Do you have one on your 928's Neil? If so, is yours disconnected too?

that part is called a freeze switch it is used to shut off power to the AC compressor when the evaporator gets to freezing temperature,
this will preven the evaporator from freezing up, it is adjustable via a small phillips screw next to the male elex connector pin.
NOTE you only need to turn it 1/4 turn or less .
You can test it with a glass of ice water,
remove screw holding it to the duct then pull it straight out,
There is a brass tube filled with oil that goes into the fins dip in water and listen for a click this tells you it functioning,
make sure to measure the water temp so you know what the open/close temp is. you must also fit the cowl cover so engine heat will have less of effect on its operation

81 doesn't have one, I know the 84 did and it was connected, and the 86 does, and its connected.

Ok, looks like I need to look for some hanging wires somewhere near there.