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

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-04-2008, 09:32 PM
Registered User
 
Join Date: May 2008
Posts: 1
Unhappy 1999 500SL AC not working

I have a 1999 500sl and the AC stopped working, only hot air blows out. I checked fuses and they were ok. I checked the low pressure side and it was high. Any suggestions what else to check?
Thks,

Reply With Quote
  #2  
Old 05-05-2008, 02:34 PM
just-n-time's Avatar
Registered User
 
Join Date: Feb 2006
Location: Louisiana266 Maloy Rd winnfield71483
Posts: 804
If you have a high pressure reading the clutch will cut out and not pump. you most likely have a restriction and probably at the expansion valve, your year may have the needle valve orifice,they tend to plug with a thick black gunk,if so then the system needs to be flushed,check around see if you can find a service place that will flush it with nitrogen, dose a great clean out.
Reply With Quote
  #3  
Old 05-05-2008, 02:35 PM
Registered User
 
Join Date: Oct 2005
Posts: 4,263
I suspect that my "high" he means only 70 psi or so. A quiescent system will have such a reading on the low side.
Reply With Quote
  #4  
Old 05-05-2008, 09:27 PM
Registered User
 
Join Date: Jun 2007
Posts: 19
have your system cleaned and if that dont work put a rebuilt compresser and it will solve all your problem. the clutch is not working properly on compresser.
Reply With Quote
  #5  
Old 05-05-2008, 11:52 PM
Registered User
 
Join Date: Feb 2002
Location: St. Louis, MO
Posts: 340
If the cold air went away ....

suddenly, you could have a bad evaporator temperature sensor. A lot of MB cars have diagnostics that can be run with the A/C controller. Look for info on how to do this and interpret them. Use the search feature of the forum.

Reply With Quote
Reply

Bookmarks

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 09:28 AM.


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