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Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53904
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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2005 Mercedes CLK500. Installed new A/C compressor, worked

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2005 Mercedes CLK500. Installed new A/C compressor, worked for 2 days and quit. Ran test, no codes, faulty compressor. Replaced with another new one, same result. Replaced SAM, figured signal might be bad damaging the compressor. Signal to compressor good, ground good, no codes. Compressor won't create pressure. Don't want to hang third compressor on car. What am I missing?

Hi, my name is***** the inside of the suction hose and see if it is collapsed.

Let me know what you find.

Customer: replied 10 months ago.
Sounds like that may be it. Hose looks bad, cut into it, don't see a blockage but I can see how under right pressure/suction it could collapse. Will have new hose in the morning and then run it. Thanks, we'll message you in the a.m.

Sounds good. I'll wait to hear from you.

Customer: replied 9 months ago.
Installed the new hose and still have the same problem. Think now it may be an obstruction in the expansion valve. Have a good weekend. If you come up with anything else, let me know.

Hi Axel, you definitely seem to have a blockage somewhere. The best thing to do would be to open the system up and flush through all of the components. Expansion valve, evaporator, drier and condenser are all possibilities.

Hi Axel, just checking in. Did you get the a/c problem figured out?

Customer: replied 9 months ago.
Problem ended up being the alternator. The one-way clutch was bad and causing an issue with the compressor. Changed it out and all is working fine. Thanks for your help though.

Good find! I'm surprised he wasn't having charging system issues! Glad you got it squared away.


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