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Old 10-09-2015, 05:58 PM
Benz Mondi
 
Join Date: Nov 2006
Location: Sacramento area
Posts: 308
1990 300E a/c compressor/clutch gremlin?

What do I need to do to engage the a/c clutch while this new compressor is on my bench?

Genesis: Suddenly, my a/c compressor won't engage again, In my previous post, when I pushed the a/c button on my climate control, the #7 fuse would blow. I thought I had narrowed it down (by disconnecting various items in the system) to a bad MAS. I replaced it with a used one and all worked again.

Now, though the #7 fuse doesn't blow, the clutch wont' engage. I'm on my 3rd MAS and 2nd OVP and still nothing.

I even have a new (rebuilt) compressor on hand (ordered for my SL) to use as a test bed. Unlike other compressor clutches on my other non-MBZ cars, I could just apply 12v to the clutch plug and get the clutch to move in-ward to engage. I can't seem to get even the clutch on the new one to engage after applying 12v to 2 of the 3 poles in the socket, in any combination.

Any ideas?

Thanks.
__________________
03 CLK430 Cabrio 211K Pweter Silver/ Oyster Leather
90 300SEL 214k Pearl Black/ Alto Grey/Black Leather

Prior: 85 190E, 88 300TE, 89 300TE, 90 300E 2.6, 90 300TE, 92 300E 2.6, 91 and 93 300SL, 87 Ferrari Mondial Cabrio
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