Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 02-22-2014, 10:31 PM   #1
Registered User
 
Join Date: Feb 2013
Location: Israel
Posts: 26
2000S fans not working good

Hi,

After I gone over a few forums about the fans issues I didn't find the answer.

My problem is that the fans are not running on the low speed. only on the hi speed. they do work on low speed when I start the a/c but they don't engage at low speed when they reach the hi tempeture.

relays= ok
fuses=ok
resistors ??? can it be that both of them not good? Can be also that one was bad before and only one worked, I didn't noticed it and only when both of them broke the car overheated?

So, any Idea what can couse the fans not to trigger on low speed? (remind you that the a/c do trigger the low speed)

Thanks
Yaron
__________________
1982 Black 911sc coupe
2000 Boxster S
2007 Harley Davidson Night Train (very customized)
1971 conv' beetle, 2332cc (sold )
ybn533 is offline   Reply With Quote
Old 02-23-2014, 02:53 PM   #2
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,429
Yes, it can happen that both resistors are bad as you described.
__________________
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
thstone is offline   Reply With Quote
Old 02-23-2014, 09:06 PM   #3
Registered User
 
Join Date: Feb 2013
Location: Israel
Posts: 26
Quote:
Originally Posted by thstone View Post
Yes, it can happen that both resistors are bad as you described.
So, if I understand right than the resistors are responsible to trigger the LOW speed?
__________________
1982 Black 911sc coupe
2000 Boxster S
2007 Harley Davidson Night Train (very customized)
1971 conv' beetle, 2332cc (sold )
ybn533 is offline   Reply With Quote
Old 02-24-2014, 06:28 AM   #4
Registered User
 
Trey T's Avatar
 
Join Date: Dec 2009
Location: Texas
Posts: 244
Most likely the resistor. I got rid of the bad resistor and tied both mode together as high until I found a better resistor.

I later found a different brand (Denso) and used it for low speed, same resistance and power rating.
Trey T is offline   Reply With Quote
Old 02-24-2014, 07:54 PM   #5
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,429
Quote:
Originally Posted by ybn533 View Post
So, if I understand right than the resistors are responsible to trigger the LOW speed?
The ECU determines if the fan should be operating at high or low speed. Then the fan relays are used to route fan power through the resistor for low speed or not through the resistor for high speed.
__________________
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
thstone is offline   Reply With Quote
Old 02-25-2014, 07:41 AM   #6
Registered User
 
Trey T's Avatar
 
Join Date: Dec 2009
Location: Texas
Posts: 244
No. Both fan has independent resistor. You can find these fan/resistor on older Mini Cooper
Quote:
Originally Posted by ybn533 View Post
So, if I understand right than the resistors are responsible to trigger the LOW speed?
Trey T is offline   Reply With Quote
Reply


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 -8. The time now is 10:21 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page