One would think that resistance should vary with temp, but testing isn't that easy as the connector for it is a tiny plug kinda shaped like a DC adapter plug.

This is what I did with the servo motor in my SC.

The levers work really well.




http://forums.pelicanparts.com/uploa...1213772573.jpg

When I first got my car years ago, I stopped by the local Porsche dealer to order the owners manual. While I was there I asked the guy if he could give me a run down on all the climate controls while I waited for the manual to arrive. He said, "Sure" and came out, looked it over for a bit and then shrugged and said, "I have no idea." :D

It's really simple. If you're too hot, open the windows. If you're too cold... close them! ;)