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 ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-21-2001, 04:36 AM
Registered User
 
Join Date: Jul 2001
Posts: 74
A/C freon pressure switch

Just yesterday my compressor clutchstopped engaging when A/C blower switch is engaged. Connected the leads going to the pressure switch and the compressor engaged, did not want to run it long enough to check the drier site gage for activity. I have some freon pressure on the high and low sides. Any way to check the switch without losing R-12 charge?
__________________
1987 190 Euro
Reply With Quote
  #2  
Old 08-21-2001, 08:55 AM
LarryBible
Guest
 
Posts: n/a
Have you put guages on to check pressures? If the system is charged you will be able to see if the switch is operating correctly by monitoring pressures and using an ohmmeter or testlight on the switch.

Good luck,
Reply With Quote
  #3  
Old 08-21-2001, 09:34 AM
WDurrance
Guest
 
Posts: n/a
I doubt that the switch would be the problem. But then there is a first time for everything. There is a much greater chance that the R-12 has leaked out. When you by-pass the switch look at the sight glass on the dryer. If the system has anything in it, the glass will look white as the freon begins to circulate. If it remains mostly clear there isn't enough refrigerant left to keep the switch closed.
Regards,
Randy D.
Reply With Quote
  #4  
Old 08-21-2001, 11:16 AM
Registered User
 
Join Date: Aug 2001
Location: Florida
Posts: 272
With respect to Mr. Durance let me use a couple of different words that might help. The "white freon" he refers to is the frothing of the freon because of air in the system. A fully charged system is totally clear and looks as empty as it does full so if you can determine the level of freon in the sight glass that will help you confirm or discount this part of your diagnostics.

Good luck
Reply With Quote
  #5  
Old 08-21-2001, 06:21 PM
Registered User
 
Join Date: Jul 2001
Posts: 74
Found the problem. Had an intermittant leak on both ends of the high pressure line and freon was almost completely depleted. Thanks for the help
__________________
1987 190 Euro
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Procedure for Replacing Neutral Safety Switch on 126 Chassis downeyjc Tech Help 2 06-20-2008 02:47 AM
What a/c pressure cycles the electric radiator fan? The Warden Diesel Discussion 12 03-26-2004 06:20 PM
300E a/c blower controlled by a new switch on dash asiamood Tech Help 2 11-17-2002 02:21 AM
a/c Pressure for '88 300e Michael B Tech Help 1 06-03-2002 09:10 PM
self leveling suspension question Wael El-Dasher Performance Paddock 8 03-19-2000 12:28 PM



All times are GMT -4. The time now is 07:36 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, 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