Quote:
Originally Posted by C Sean Watts
PO's receipts from the dealership listed, "aux fan shorted ON, owner will return for temp switch replacement." or something like that.
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I see.
Well, I would certainly do a little looking before condemning the sw.
It only takes 1 minute to unplug the sw leads to see if the fan stops. If it does , the diagnosis is correct, but if it does not, it could be as simple as a common stuck relay or even a fan sw by-pass by a previous owner.
Be a shame to open up the refrigerant system for a wrong diagnosis.
This would be the sw. that operates low a/c fan and you just unplug one of the pigtail leads for this test.
http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=2AO123CS42CT18JUFB&year=1987&make=MB&model=300-DT-002&category=R&part=A%2FC+Temp.+Switch