Hi guys:

I've solved the problem with assistance from chiro, a member on this forum and everyone else's suggestions. Chiro showed me how to ground out the switch to test if the Aux. Fan was okay and that the switch was malfunctioning.

We grounded the 100 degree switch as recommended by grounding it to the block. Guess what???? The Aux. Fan kicked in and the temperature began to drop.

I will install the new switch tomorrow and let you all know how I made out.

I have to thank everyone for their suggestions and I am looking forward to using my A/C again!

I will recap what symptoms I was having and what we did and how we resolved the problem, once the switch is installed and tested.

Thanks again,

Brad.

__________________
Dr. Brad

2003 C320 4Matic Station Wagon
2002 C240 Elegance
1982 380 SEL Star Certified