Quote:
Originally Posted by Phillytwotank
Not original equipment. Your looking at a part of this https://unwiredtools.com/accii.asp
very common upgrade to early w123s that came originally equipped with the ACC II climate control system, the "evil servo"(look it up)
If it is opening and closing like that i would assume that it is working properly. regulating hot water flow based on where you have the cabin temp selector set. |
I've rebuilt these evil servos and even though it has been over twenty years since I did so I seemed to remember everything went through the valve body in the base of the servo. I just figured this valve was something that came along later.
And these servos are not hard to rebuild. They are hard to keep in the correct order once you have taken them apart but they can be rebuilt. When I saw the cost of a replacement I didn't think I had anything to lose by trying to rebuild it.