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 09-05-2000, 11:06 AM
roland
Guest
 
Posts: n/a
hi, i'm tired of my compressor cutting out while it's still not cold. how do i perform a mod to put a switch on the dash such that i can turn on/off the compressor at will? after all, it's practically hot all the time where i am...

understand from a prev post that there is some kind of valve/relay that is linked to the evaporator? will replacing that help, and what does it look like? my w123's a/c is a non-climate control type... thanks.

roland
Reply With Quote
  #2  
Old 09-05-2000, 01:50 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
There probably isn't a more costly way of dealing with your problem. I don't get it. If its broke why don't you fix it. Since you haven't specified the year or model or in your case the A/C version, its hard to make guesses.

I'm relatively sure that a rig such as you want will cost more to have done than a proper diagnosis.

------------------
Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
Reply With Quote
  #3  
Old 09-05-2000, 09:56 PM
Registered User
 
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
If you know that the evap temp regulator is not regulating properly, just replace it. (IF it is the problem)

------------------
Benzmac:
Donnie Drummonds
300E
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM
Reply With Quote
  #4  
Old 09-05-2000, 10:01 PM
roland
Guest
 
Posts: n/a
gosh, thanks steve, for the timely advice.

now if anyone could help me with this - what does the evap temp gauge look like and where is it? i can't find it in my chilton's book.

the compressor sometimes "kicks out" while it still isn't cold, and "kicks in" again, and it especially likes to kick out during idle though not exclusively. is this eva temp gauge expensive? what else are possible causes of this? a bad compressor clutch?

my 123 is a M115 200 - 1979.
Reply With Quote
  #5  
Old 09-05-2000, 10:17 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Being a entry model 123 chassis I presume it has manual A/C not Climate Control. From the year this would mean a simple "ranco" style evaporator temperature switch. This is the same type switch with gas filled capillary tube into evep that works on old refrigerators/water coolers/Coke machines. Power comes in and is switched to the compressor through this switch which in MBs case is a fixed (non operator adjustable) temp switch. It is located behind the glove box.

Power comes through the blower switch I think and goes from the evap switch through the low pressure switch. Many places for poor circuits.
Reply With Quote
  #6  
Old 09-09-2000, 06:09 AM
roland
Guest
 
Posts: n/a
i have removed the glove box, but can't seem to find the evap temp switch. what does it look like?

given the fact that it is a "manual" a/c, it wouldn't have an aircon temp sensor right?

also, does having not enough "gas" in the a/c system affect when the compressor cuts in?

thanks.
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
Please come in W123 fans! Holson Adi Off-Topic Discussion 39 03-21-2005 09:04 PM
FS Beautiful hit 83 300D or WTB Beautiful w123 with no drivetrain JHZR2 Mercedes Cars For Sale 3 12-13-2004 01:04 AM
lots and lots W123 noob buyer questions... volvonoob Diesel Discussion 10 11-10-2004 06:12 PM
W123 Test How Well do you KNOW your parts? Idahoel Diesel Discussion 9 12-06-2003 02:04 AM
VW TDI vs. W123 Rick Miley Diesel Discussion 51 09-23-2003 02:20 AM



All times are GMT -4. The time now is 06:26 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