Aux fan running ???

Jumper this sw and see if fan comes ON

http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=23I0RAMEE24118NOLA&year=1986&make=MB&model=420-SEL-001&category=R&part=A%2FC+Temp.+Switch

Arthur, you're getting quite a work-out on the aux fans this year!

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2012 E350
2006 Callaway SC560

It's that time of year again...pretty hot everywhere , too...

It is amazing how far along this Forum has come as far as DIYer a/c knowledge...I haven been here since day one, and I can remember when no one would even dare touch their a/c system [ or know anything about it]..so, the Forum has done well on a/c edumacating it's members in this highly specialized field......
There are reg guys here who now know more about their a/c systems than the guy they used to take it to.
Gotta love it ...........

I don't know about my knowing more than the guy I used to take it to, but it sure has helped me. Thanks again!

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1993 400E, 256,000 miles (totaled)
1994 E420, 200,000+ miles
1995 E420, 201,000 miles

I can remember when a/c was a new car thing.... our running joke when a guy would ask " "..uuum , What kinda' Gas do you put in there?? "
.....of course our answer was .."High-Test !! "

Aux fan works because when i replaced the drier I bought the little red leads that everyone says go bad and it started working again. Should the expansion valve be hot on one side? I know the front of it gets hot and the back is cold.

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual

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The red leads ?

Are you talking about the sw with the pigtail leads ?
Do you have gauge readings ?

Yes those leads that go on the drier. I do not have any gauge readings.

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual