Hi Steve,
Pardon the ignorance. I enclosed a picture of the heating pump because I cannot locate the servo unit. (The attachment didn't work.) :-( Is it close to the heating pump or underneath it?

Also, when I turn the ignition on with the engine off, pressing the auto-lo button did not turn on the blower. Does this mean the servo was not actuated?

I do have the Service Manual on a CD and I tried hard to look for the servo but I am not sure where it is located.

Thanks for you reply to my posting.
Omy