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

LinkBack Thread Tools Display Modes
Old 05-10-2002, 02:23 AM
woz woz is offline
Registered User
Join Date: Jan 2002
Location: England Sheffield
Posts: 15

Hi there, just a quickie. A while ago the cooling fan on my 190e 1989 was not coming on at all no matter what temperature. I understand that it is supposed to kick in at around 100 degrees. I was advised to change the (dont know what its real name is) temperature sender unit!! You know the brass thing that screws in on top of the engine. Well I have done that now and it still isn't working. I have tried touching the contacts together and the fan works when it is given direct power. Are there any other things I should check for? Thanks.
Reply With Quote
Old 05-10-2002, 07:51 AM
Registered User
Join Date: Jun 2001
Location: Omaha, NE
Posts: 962
First, do a search on "aux fans" and you'll see lots of posts on testing these fans. Then see what questions remain unanswered ...
'93 400E
Reply With Quote
Old 05-10-2002, 09:22 AM
Fimum Fit
Posts: n/a
I think that you replaced the wrong sensor

Your model is one with which I am not familiar, but I would expect that the sensor which controls the fans is on the radiator, not the top of the motor, since its job is to judge whether the coolant has been adequately cooled before it goes back to the water pump to be sent back into the motor.
Reply With Quote
Old 05-10-2002, 10:51 AM
Registered User
Join Date: Jun 2000
Location: Saugus, CA USA
Posts: 2,006
Do you mean the contacts on the thing you replaced?
Reply With Quote
Old 05-10-2002, 11:58 AM
J.HIDALGO's Avatar
Registered User
Join Date: Jul 1999
Location: Jax, FL
Posts: 1,785
Do a search!

However, how is your AC working? There are two things that trigger your fans. The temperature switch (which you already changed) and the pressure switch on top of the AC receiver/dryer. You can also touch both contacts on that swicth to see if the fans start working. If you have low freon in your AC, the fans will NOT work. As far as the 105 or 115 degree (the number is on the side of the switch) temperature switch will NOT operate the fans unless the coolant in the engine reaches that temperature. There is also a resistor, low speed, high speed, so do a search. It has been discussed before...
'86 300E
Reply With Quote


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 10:48 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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