107 AC Ground Issue?

[cewoz]

Hi all new 560sl owner picking it up on Sunday...i was unable to find an answer to my issue searching the forums. So i am posting a new one; my apologies if this has been already addressed.

The seller called me the other day to let me know there is an issue with the a/c. He took it to his mechanic and was unable to determine a fix.

Below is his description of the issue:

The A.C. compressor isn't turning on. If it's grounded, it turns on and produces ice cold air. It's not getting grounded may be due to a faulty switch or relay. The system is fully charged, holds freon and gets cold once the compressor turns on.

I included a pic for your pleasure


Anyone have any ideas?

[fpilot]

Hi there. At last, I feel I can possibly help someone on here. This is an awesome site and I have gotten some great advice and suggestions.

I just corrected this problem on my 1986 560SL. It took a lot of time at many shops and many trials and errors so hopefully I can help you avoid all that. It was my ac control module and ac control module relay switch (black switch that goes on the front floorboard of the passenger side. Replaced both and things are working good now! Now I won't be too hot in the Texas heat. Hope that helps and best of luck!

Fpilot

[cewoz]

FPilot-

Thanks for the reply...I will try your suggestions first. I feel the way you do most of the time, I am just gathering info...I bet it feels good to give back!

Chris-