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 10-22-2000, 07:46 PM
Registered User
 
Join Date: Jun 2000
Location: Near Williamsburg, Virginia
Posts: 367
The neither the 5-blade cooling fan, nor the secondary electric fan are engaging when the engine temp rises. How do I trouble shoot this? The secondary electric fan engages when the A/C is operating. I have an '85 Euro model with three sensors in the theromostat housing. Going from right to left the first switch has three wires, and I assume is the temp switch for the solenoid fan coupling and the 2-stage aux fan. I assume this witch is bad. How do I check it? The second switch (two-wire) is for retarding the CIS ignition system as the temp rises. How do I check it? It is supposed to retard he ignition by as much as 5 degrees as the temp changes. I have no idea if it is functioning or not. (On my 190SL I make this adjustment manually when driving on a hot track or hot (summer)city streets.) I have no idea what the third (single pole) switch is for. All fuses look good.

------------------
Robby Ackerman

190 SL
190 E 2.3-16
300 D
Past President
Virginia Section MBCA

Reply With Quote
  #2  
Old 10-23-2000, 05:12 PM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Unless the engine goes above 105C none of the OVERHEATING switches operate. Fan clutch doesn't lock up until 100C. How hot does the engine run?

------------------
MERCEDES BENZ MASTER GUILD TECHNICIAN (6 TIMES)
ASE MASTER TECHNICIAN
27 YEARS DEALER M.B. Shopforeman
190E 2.3 16V ITS SCCA racecar
Reply With Quote
  #3  
Old 10-23-2000, 08:11 PM
Registered User
 
Join Date: Jun 2000
Location: Near Williamsburg, Virginia
Posts: 367
it will creap up to 120 C without engaging.
Reply With Quote
  #4  
Old 10-23-2000, 08:15 PM
Registered User
 
Join Date: Jun 2000
Location: Near Williamsburg, Virginia
Posts: 367
The car is equipped with a manual (override)switch the aux electric fan. I've been turning it on at about 115 C and off at 90 C.
Reply With Quote
  #5  
Old 10-24-2000, 09:13 AM
yal's Avatar
yal yal is offline
Benz-smart
 
Join Date: Oct 1999
Location: New York, Long Island
Posts: 2,707
Change the switch...its most likely the fan switch. Inexpensive. Give your vin# and you should get the right one but I believe there is only one 3 prong one. The secondary fan will kick in when the AC is on. Does the override switch engage the big fan? I have never seen this...is it an aftermkt add on? If so is it fused?

------------------
yal
88 230E (W124)
euroheadlights,
clearcorners,
smoke/red tailights
98 e420 sport replicas
Reply With Quote
  #6  
Old 10-24-2000, 08:23 PM
Registered User
 
Join Date: Jun 2000
Location: Near Williamsburg, Virginia
Posts: 367
Yal

The aux fan switch was in the car when I purchased it. It can be used to turn on the Aux electric fan at will. I expect it is fused. This switch is rocker switch between the passenger window switch and the right side mirror control. I'll order the part you mentioned. 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
DIY Notes may help people: Radiator, Fan Clutch, Temp Sensors, Fuel Pump, Temp Gauge ericgr Mercedes-Benz SL Discussion Forum 3 09-24-2004 01:40 AM
Auxiliary Fan Question JBoggs Tech Help 9 07-30-2003 10:07 PM
dumbest cooling fan question seafood54 Diesel Discussion 4 02-17-2003 10:27 AM
97 C230--Electric cooling fan questions rpmillie Tech Help 0 06-24-2002 01:51 PM
350 SDSL Cooling Fan Clutch? ezrider Diesel Discussion 5 06-09-2002 12:03 PM



All times are GMT -4. The time now is 10:09 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page