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 08-14-2000, 12:27 PM
Registered User
 
Join Date: Oct 1999
Posts: 1,562
I'm wondering what possible culprits in A/C may be?- -Had opportunity to travel in 90-100 degreee heat this weekend. 1994 E320 Coupe Starmark @ 81K miles sat in sun all day. I placed A/C on max (click with wheel) &/ "Auto" fan button depressed, drove about 10 blocks in 5mph stop and go traffic and observed that air through ducts was barely cold (all windows & sunroof closed, recirc. air button not depressed) . I got through traffic in about 20 minutes and proceeded to freeway speed. Once up to 35-40mph+ speed, I observed air through the vents got chilly cold. Any ideas on possible culprits? I also observed that the engine temp stayed at the 100 degree level in stop and go traffic without the aux fans coming on. Is this abnormal also? Thanks in advance for your insights.

-fad
94 E320 Coupe
Reply With Quote
  #2  
Old 08-14-2000, 01:25 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,773
I drive a '95 E320 in heat of south Ga. The things that you described sound about normal. In the stop and go traffic with the A/C on how high did the coolant temp get. If it stayed below 100 C then it sounds ok.

engatwork
Reply With Quote
  #3  
Old 08-14-2000, 06:05 PM
Registered User
 
Join Date: Dec 1999
Location: Glen Burnie, MD, US
Posts: 30
I encountered the same problem in my 92 400E. I took my car in for its 90k service and my mechaninc found that I had a blown fuse for my front engine fans and was approx. 1/2lb low on refrigerant. Both of the items were fixed and my car is blowing cold now, whether I am standing still or going 90 mph. Believe me, it made the difference in the Maryland heat and humidity.

Brian

[This message has been edited by mcelroyb (edited 08-14-2000).]
Reply With Quote
  #4  
Old 08-14-2000, 07:42 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,773
I had to read your post again to pick up on something that I missed the 1st time. Do this, after driving the car to warm it up park it, turn the A/C on high and see if the aux. fans run. If they do not run check the 15A fuse on top of the aux fan relay. There is a black plastic box behind the underhood fuse box. Remove the 6 phillips screws and remove the black plastic box then you will find two relays. See if the fuse in one of them is blown. Replace it with a 20A fuse and you should be good to go.
good luck
engatwork.
Reply With Quote
  #5  
Old 08-15-2000, 12:24 PM
Registered User
 
Join Date: Oct 1999
Posts: 1,562
Thanks for your replys-

The temp stayed at 100 degrees steady in stop and go 5mph traffic till I reached about 40mph+ on the freeway. Once on the freeway the temp proceeded downward till just a tad above the 80 mark (normal). The a/c at 40mph+ also started acting normal. Your replys have me thinking that this is not normal so....

I'll check the fuse and have the dealer check the system (Starmark) at the end of the month- - since it was the first appt. available.

Thanks again for your replys.
-fad
94 E320 Coupe
had:
72 280 SE 4.5 (mint)
69-70 250SE 4-speed manual (mint)
88 BMW 325is (mint)
80 BMW 320is (x2 mint)
86 Alfa Romeo Quadrifoglio
79 Tri Spitfire
etc.
Reply With Quote
  #6  
Old 08-15-2000, 01:41 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,773
fad, do the aux. fan test this evening - that will tell you immediately whether it is the fuse or not.
Reply With Quote
  #7  
Old 08-15-2000, 03:28 PM
Registered User
 
Join Date: Oct 1999
Posts: 1,562
I'll do the aux fan test this evening-

After driving and warming up, should I keep car engine running while placing the a/c on high?

tks-fad


Reply With Quote
  #8  
Old 08-15-2000, 04:05 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,773
yes, the engine will have to be running
Reply With Quote
  #9  
Old 12-06-2000, 01:13 PM
Registered User
 
Join Date: Oct 1999
Posts: 1,562
problem resolved:

factory authorized service replaced sensor.
Reply With Quote
  #10  
Old 12-06-2000, 01:20 PM
Q Q is offline
Registered User
 
Join Date: Aug 2000
Posts: 839
which sensor?
Reply With Quote
  #11  
Old 12-06-2000, 01:31 PM
Registered User
 
Join Date: Oct 1999
Posts: 1,562
I believe that it is the temperature sensor that kicks fan on at approximately 90-100 degrees (not sure on the exact temperature figure).

It appeared to be an easy diagnosis/ common wear item?, a very quick job to replace (received the vehicle back same day), and the part was quite inexpensive (covered by my extended warranty).

Hope this helps.
-fad
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
82 300D cooling problems DIESEL Diesel Discussion 6 05-03-2002 01:47 AM



All times are GMT -4. The time now is 01:52 PM.


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