I had perferct a/c on my 91 500sl mercedes Because less than 8k miles ago the whole system was completely gone through.Drove car the fan belt broke.Got this fixed and now no A/C.? Help!

Asked by Jan 26, 2017 at 05:11 PM about the 1991 Mercedes-Benz SL-Class 500SL

Question type: Maintenance & Repair

I had perfect a/c on my 91 500sl Mercedes Because less than 8k miles ago the whole system was completely gone through.Drove car the fan belt broke.Got this fixed and now no A/C.? Help! What could cause the A/C to go out when the fan belt broke. Had fan belt, tensioner and smog pump replaced.  Drove it back from mechanic and noticed the was no A/C. The belt was still lying there and it was verified later that it did not "hit" anything that involved the A/C.  The a/c and the smog pump are on two different sides of the engine.  Could a relay or other controller go out to cause this situation?  Any ideas would be helpful.  My mechanic has no idea why a broken belt would effect the A/C.  Do you know why?  Thanks for ANY suggestions.

1 Answer

10,275

Unless the belt is attached to the compressor, that would not be your problem. Are you sure the same belt does not connect to everything - including the AC compressor. If it is a separate belt, most likely the switch that turns the compressor on and off or related relay. Best guess - it was just coincidence that it failed when your fan belt broke.

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