It is weird. I actually got out of the car and put my hand on the monovalve to make sure that was what was making the sound (dude that puppy was HOT!).

So, the temperature control module that you are referring to, is that the box attached to the right of the blower?

__________________
~shell
As of 2/2010:
2001 CLK55 0o\=*=/o0
13.6 @ 106mph
10K mi
1984 300SD
260K mi and going and going...
97 S600
46K miles
1991 Sentra SE-R (extremely dorked with)
www.se-r.net