S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

1997 s320 AC issues.

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Old 05-09-2017, 07:16 PM
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1997 s320
1997 s320 AC issues.

Sold my air-conditioning unit worked fine until the compressor seized up on me. I replace the air compressor in the dryer and then I had to replace the battery on the car. When I replace the battery all of a sudden my AC unit would only blow through the defroster and will not blow cold after getting a recharge To changing the battery have caused issues with in the control unit? I've been to 1000 forums and I cannot figure out how to get in or read the error codes on this particular control module. I do not hear any vacuuming hissing sound so I'm praying that's not the problem. Help!
Old 05-10-2017, 09:40 AM
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1999 E300TD
You have self diagnostics on the AC control unit---run the actual value and fault tests and post the data-----if this is new to you, oh well get off the couch and google and forum search as there are thousands of posts on the issue--what are the test results!!

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