Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 09-24-2002, 12:16 PM
Kim D. Hooper
Posts: n/a
560SL AC sudenly stop blowing cold air???

My perfict 1987 560SL with only 80,000 miles suddenly stopped cooling last Saterday. The car is driven only on sunny days with the top down once or so a week. Kept in garage always. The AC has until Saterday worked perfect including that tempramental climate control that has malfunctioned on my other MB cars. No apparant freon leaks, just blows unconditioned air! As the car has been cooling us on 90 Degree days with the top down until this drive am I correct in suspecting a relay? I see (2) types of relays listed : one called AC temperature relay and one called simply AC relay for 560SL. Could somone give me a direction to problem.

thanks much......
Reply With Quote
Old 09-24-2002, 03:21 PM
Posts: n/a
I suggest you don't start messing with relays until you've first checked the basics.

Open the hood and look to ensure that the compressor clutch is kicking in when a/c is turned on max cool and max fan. If it does, then look at the sight glass to see if there are bubbles. If there are no bubbles AND the clutch is turning the compressor, then it is low on refrigerant. Find and repair the leak and recharge with R12.

If it does not, hook up manifold gauges, or have them hooked up by a shop and check the charge. If it is low, find and repair the leak and recharge with R12.

If you determine that the system has adequate refrigerant first, THEN you can start troubleshooting the electric circuits, preferably not by just shotgun replacing relays. Start at the pressure sensor and electrically work back toward the relays.

Good luck,
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 09:26 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page