2000 Monte Carlo SS-Fan staying on after car shut off

Closed Thread

  #1  
Old 01-10-09, 12:55 PM
RandyAsselstine's Avatar
Member
Thread Starter
Join Date: Sep 2008
Location: Windsor, Ontario, Canada
Posts: 99
2000 Monte Carlo SS-Fan staying on after car shut off

Hello All again,

The fan at the front of the car is staying on after the car is shut down and doesn't seem to want to shut off plus the heat gauge is not working anymore and the alternator is whining plus seems to be straining when all power is applied,( new battery). Do you think there are a whole lot of issues? does anyone have any ideas--Great time to happen, right in the middle of a snow storm!!
This all happened in the last hour. Car has 128000k on it and has been pampered!
Time to have a beer and get everyone opinion on what to do and thanks allBeer 4U2
 
Sponsored Links
  #2  
Old 01-10-09, 05:03 PM
Speedwrench's Avatar
Member
Join Date: Apr 2008
Location: Oklahoma
Posts: 1,698
fan is staying on because either the temp sensor is telling the computor that your engine is hot or the relay has burned points causing it to stick, check the coolant level in the radiator and the over flow tank both. a whine from the alternator at low level is fairly common on alternators, if it is noticable then it is usually a sign that the diodes are starting to go out in the alternator, or bearings are about to go. most people don't know that low coolant levels will usually keep the temp sender from working properly.

murphy was an optimist
 
  #3  
Old 01-11-09, 12:46 PM
RandyAsselstine's Avatar
Member
Thread Starter
Join Date: Sep 2008
Location: Windsor, Ontario, Canada
Posts: 99
2000 Monte Carlo

Front fan is squeeling for about 10 seconds at warm up, thought it was the alternator sounds like it's seething up, would you replace now or wait till it goes. I vote for now??
Can you tell me the proceedure to take it out, it sounded like the driver side fan as there are 2.
 
  #4  
Old 01-11-09, 01:18 PM
RandyAsselstine's Avatar
Member
Thread Starter
Join Date: Sep 2008
Location: Windsor, Ontario, Canada
Posts: 99
Radiator fans will not turn off

Monte carlo 2000--radiator fans will not turn off after stopping, I need to turn the key to before ignition a couple of times to turn the fans off. One fan is squeeling about 10 seconds at start up.The rad is very cool and there is no reason for the fans to be on. Maybe the fans being on is the reason the temp gauge does not register any temperature??
Possibly this is the reason I thought it was the alternator an now possibly the battery is in need of charging?
The voltage gauge is fluxuating now when all electrical stuff is on.
Anyone know how to proceed??

Thanks
Randy
 
  #5  
Old 01-11-09, 01:34 PM
HotxxxxxxxOKC's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Jul 2006
Location: USA
Posts: 8,044
Randy,

You already had a thread with this question. I merged your 'new' one into the original. Please bookmark this page so you can find it later.
 
  #6  
Old 01-11-09, 04:11 PM
RandyAsselstine's Avatar
Member
Thread Starter
Join Date: Sep 2008
Location: Windsor, Ontario, Canada
Posts: 99
Fan not turning off

Hi,

What you think of disconnecting the fans and see how everything works.?
 
  #7  
Old 01-11-09, 07:28 PM
Speedwrench's Avatar
Member
Join Date: Apr 2008
Location: Oklahoma
Posts: 1,698
in this cold yes i would disconnect and drive, just remember to reconnect this summer.

how come common sense isn't so common?
 
  #8  
Old 01-12-09, 08:54 AM
RandyAsselstine's Avatar
Member
Thread Starter
Join Date: Sep 2008
Location: Windsor, Ontario, Canada
Posts: 99
Hello All,
Turns out,I still have a fan problem with the squeeling possibly but there was a code problem also which after being reset now the fans do not come on and I am waiting to see if the heat gauge works. Probably have to replace the driver side fan as it squeels for about 10-30 seconds when it starts up but There are 2--Question--What happens if 1 seizes up--does the other stop too or keep running? Anyone know!
Thx
Randy
 
  #9  
Old 01-12-09, 09:12 AM
RandyAsselstine's Avatar
Member
Thread Starter
Join Date: Sep 2008
Location: Windsor, Ontario, Canada
Posts: 99
Hi,

Heat gauge works and fans are still off, hopefully I will not need them till all this Damn snow is gone.

Thanks to all for the help.

Randy
 
  #10  
Old 01-14-09, 03:39 PM
Member
Join Date: Jan 2009
Location: Chicagoland
Posts: 40
I'm not sure from reading your posts if you still have a problem or not. But if the cooling fans continue to stay running after the vehicle is shut off then it's most likely a faulty body control module (BCM).
 
  #11  
Old 01-16-09, 04:16 PM
RandyAsselstine's Avatar
Member
Thread Starter
Join Date: Sep 2008
Location: Windsor, Ontario, Canada
Posts: 99
Hi,
I have a scanner and I can turn it off but it comes back on. Do I have to change the Thermostat and a sensor?. Howmuch does a BCM cost.
Thx
Randy
 
  #12  
Old 01-16-09, 04:21 PM
HotxxxxxxxOKC's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Jul 2006
Location: USA
Posts: 8,044
What comes back on?

What code?

If the thermostat has been replaced, I would look at the engine temp sensor.

I doubt a module is bad, and those things are $$$$$$$$$$$$.
 
  #13  
Old 01-16-09, 04:33 PM
RandyAsselstine's Avatar
Member
Thread Starter
Join Date: Sep 2008
Location: Windsor, Ontario, Canada
Posts: 99
Hi,
Every couple of days the same thing happens, I have not replaced the thermostat but it works just fine, must be a sensor of a sort & where would it be located.
Randy
 
  #14  
Old 01-16-09, 05:18 PM
RandyAsselstine's Avatar
Member
Thread Starter
Join Date: Sep 2008
Location: Windsor, Ontario, Canada
Posts: 99
I am sorry, The code is P0128 thermostat correct, but it is working and opening?
 
  #15  
Old 01-16-09, 05:42 PM
HotxxxxxxxOKC's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Jul 2006
Location: USA
Posts: 8,044
Replace your coolant temp sensor. Looks like this:



Usually it's on the side of the motor on the steel coolant line. Takes about 10 mins to change. I'll try and find a diagram.

Just read it's under your thermostat housing.

This site is really really getting me mad. Keep getting blank pages.
 
  #16  
Old 01-17-09, 06:01 AM
Member
Join Date: Jan 2009
Location: Chicagoland
Posts: 40
Originally Posted by RandyAsselstine View Post
Hi,
I have a scanner and I can turn it off but it comes back on. Do I have to change the Thermostat and a sensor?. Howmuch does a BCM cost.
Thx
Randy
Originally Posted by RandyAsselstine View Post
I am sorry, The code is P0128 thermostat correct, but it is working and opening?
That code means your engine is not reaching operating temperature soon enough. Another common problem with GM's 3.4 & 3.8L's. You need to change the thermostat not the temp sensor. Your cooling fans are a separate issue.
 
  #17  
Old 01-17-09, 08:21 AM
RandyAsselstine's Avatar
Member
Thread Starter
Join Date: Sep 2008
Location: Windsor, Ontario, Canada
Posts: 99
This picture is great now I know exactly where it is.
Thanks a bunch.
 
  #18  
Old 06-01-12, 09:47 AM
Member
Join Date: Jun 2012
Posts: 2
fans wont shut off on 2000 monte carlo:

change the temperature sensor in the block. i have a 2000 ss and it fixed the problem.
 
  #19  
Old 06-02-12, 05:58 AM
the_tow_guy's Avatar
Group Moderator
Join Date: Feb 2001
Location: SW Fla USA
Posts: 11,575
Three year old thread and CTS already mentioned.........
 
Closed Thread

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes