S-Class (W126) 1979-1991: 300 SE, 300 SEL, 380 SE, 380 SEL, 420 SEL, 500 SEL, 560 SEL, 360 SEC, 500 SEC, 580 SEC, 300 SD TURBODIESEL, 300 SDL TURBO, 350 SD TURBO, 350 SDL TURBO

air compressor not working

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Old Apr 15, 2006 | 10:17 PM
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air compressor not working

I have a 1985 500 SEL. The AC has always worked fine, including yesterday. I went to a restraunt for lunch (I about froze from the air before lunch), and when I came out, the air was hot all the way home (about 10 miles).

The fan is cycling just fine, but the compressor is not kicking in. The fuse seems OK, but if there is a relay, I am not sure which one it is. I noticed a couple of the relays are hot after running the engine a couple a short while.

When the engine is off, I can turn the front part of the compressor clutch just fine freely. Not sure if that is good or bed. I would think it should turn if the clutch to the compressor is not on.

I had the R-12 checked, and there is plenty of pressure; it is full.

I have not driven the car in a while due to dying the carpets, and want to take the family in it for easter.
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