Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 10-11-2009, 08:15 AM
Registered User
Join Date: Aug 2008
Posts: 212
Unhappy 1995 SL500 A/C compressor problem

I just replaced the compressor for a second time. First rebuilt made "whinning" noise after it was replaced, but the air was cold. Rebuilder sent replacement. I just installed it, along with new expansion valve and drier, with help from ASE certified tech. Air compressor will not cycle on even when the dash light indicates it should be activated. Also, before this second compressor was installed, the electric fans worked properly, ie. turned on when the engine coolant temp climbed toward 90C (hot outside) and when the a/c was "running" like it was supposed to. Now the fans are on from the onset of starting the car even with the engine is cold. Did we reverse a wire or have a switch go bad in the process of taking things on and off? This thing is costing me a lot of money and time removing and replacing twice even thought the part was covered, the labor is not.

Reply With Quote
Old 10-12-2009, 08:23 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
1st thing to do is test the coolant temp sensor for the aux fans!

A shorted OR open circuit on that sensor WILL keep the compressor from coming on.

MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 11:49 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page