Rust powder in A/C lines

That sensor is a switch. Usually they are ok, but new ones are available.

Your dryer should look like this:

Mopar receiver / dryer

The guys at that site can get most of the A/C parts for our cars. If you need something that is not in their online catalog, call them & talk to them in person. Jack or Tim have both been doing nothing but A/C for decades - it is an old family business.

B.