W163 AC Compressor clutch not engaging - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 07-10-2009, 01:34 PM Thread Starter
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W163 AC Compressor clutch not engaging

Original owner 160K first problems with AC, blowing hot so recharged with 134a and seems to hold pressure very nicely, no apparrent leaks filled to about 60psi. Fuses and relays in main fuse box are all ok. Compressor clutch spins freely but still will not engage after recharge. Also cannot get aux. cooling fans to run. If problem is switch or sensor please help me find them under the hood.

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post #2 of 3 (permalink) Old 07-10-2009, 09:57 PM
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post #3 of 3 (permalink) Old 07-13-2009, 07:02 AM Thread Starter
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compressor engagement

Thanks for the reply. I have searched and searched the w163 forums but have not found much at all about compressor problems specifically. BTW I did get the aux fans to run by puling out the connector for the engine temp sensor. Nothing I have tried so far will get the compressor clutch to engage however, even though it turns free and system is charged well.
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