05-19-2009, 08:27 PM
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#1
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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What temp do the fans kick on?
Been searching the site about it and I'm just trying to figure out if I have to replace the sensor or not.
My cooling fans are not kicking on. The Casper Fan Switch still works so the fuses and relays are all good.
Since I switched to the green antifreeze the car's been running a little hotter than normal. Normal in my car is 1/2 way between 1/4 and 1/2 on the temp gauge. Tonight it got upto 1/2.
The only times it gets upto 1/2 is when I'm sitting in traffic on a 90*+ day with near 100% humidity.
fans used to be on just below the 1/2 way mark 
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
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05-19-2009, 08:54 PM
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#2
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636 whp
Join Date: Aug 2006
Location: AZ
Posts: 11,876
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Fan 1 On Temp 223 F
Fan 1 Off Temp 218 F
Enable ECT 212 F
Enable IAT 171 F
Disable ECT 212 F
Disable IAT 126 F
They seem to come on also under other conditions.
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05-19-2009, 09:10 PM
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#3
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Now a Ford Traitor.
Join Date: Mar 2008
Location: Greenland
Posts: 6,996
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mine fail..... now, does the sensor also control the gauge? my gauge works, just my fans dont work
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05-19-2009, 09:14 PM
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#4
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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223 would be over 1/2 way.
IDK it seems that they came on more when I ran Dexcool 
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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05-19-2009, 09:26 PM
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#5
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Just realized that with the DHP PCM the fans kick on at 186*
The sensor's only $18
Part number 36403 at Advance Auto Parts
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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05-19-2009, 09:29 PM
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#6
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GLS member
Join Date: Nov 2008
Location: ohio
Posts: 1,460
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my fans dont come on unless i turn on the a/c ... still trying to figure out why
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05-19-2009, 09:40 PM
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#7
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Now a Ford Traitor.
Join Date: Mar 2008
Location: Greenland
Posts: 6,996
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Quote:
Originally Posted by worknprog.99
my fans dont come on unless i turn on the a/c ... still trying to figure out why
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same in my saturn!!!!
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05-19-2009, 09:42 PM
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#8
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636 whp
Join Date: Aug 2006
Location: AZ
Posts: 11,876
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Because the fans are there mainly to control overheating, which you normally aren't running 212+ F.
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05-19-2009, 09:56 PM
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#9
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Going to check my fuses and relays at breaktime
I ALWAYS have the A/C on in my car and the fans aren't on.
Gotta fix the problem fast, the wife is taking the car on Thursday and she'll drive it until it catches fire, then call the car a POS 
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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05-19-2009, 10:17 PM
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#10
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GLS member
Join Date: Nov 2008
Location: ohio
Posts: 1,460
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ok ion then why does the car constantly run half or above?? new TS ne water pump, fresh flush to green, new sensor no leaks oil is clean no internal leaks..... fuses relays good.. any ideas noone and i mean noone can tell me why
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05-19-2009, 10:31 PM
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#11
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My car always runs at half sense the day my parents bought it new off the lot of the dealership
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05-19-2009, 10:42 PM
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#12
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636 whp
Join Date: Aug 2006
Location: AZ
Posts: 11,876
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It's supposed to run at half.. that is "normal operating temperature", around 196 F.
You could have air in the system still, or a poorly performing radiator. Why does mine constantly run above 200? Still working on getting air out of the system... very annoying.
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05-19-2009, 10:48 PM
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#13
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GLS member
Join Date: Nov 2008
Location: ohio
Posts: 1,460
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hmmm .. everytime i let an alero or any other car run at work for multiple hours they never even touch half, usually stay inbetween quarter and half
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05-19-2009, 10:51 PM
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#14
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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I didn't think about air in the system, but the fans should still kick on.
Probably going on break in 10 minutes 
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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05-19-2009, 11:17 PM
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#15
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GL Member
Join Date: Dec 2008
Location: Allen Park, Michigan
Posts: 354
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Mine only come on when I turn my A/C on as well, I've seen my car get dangerously above the 1/2 mark until I turn on the A/C or defrosters and knock some heat into the car  This gets considerably unpleasant during hot days... I don't mean to thread jack but what do I need to replace for them to kick on without me having to turn the A/C / defrosters on?
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2002 Alero 3400 4 door
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05-19-2009, 11:38 PM
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#16
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GLS member
Join Date: Nov 2008
Location: ohio
Posts: 1,460
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Quote:
Originally Posted by jrim
Mine only come on when I turn my A/C on as well, I've seen my car get dangerously above the 1/2 mark until I turn on the A/C or defrosters and knock some heat into the car This gets considerably unpleasant during hot days... I don't mean to thread jack but what do I need to replace for them to kick on without me having to turn the A/C / defrosters on? |
i wish i new |
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05-19-2009, 11:43 PM
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#17
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Just took mine for a drive, they didn't kick on but the car didn't get hot enough.
Pulled into the parking lot, parked and popped the hood, no fans, turned on the AC, fans turned on just like that.
There are 4 relays that control the fans. One for the A/C (#14), one for the cooling #1 (relay #12), a general one (#11) and another one (#15)
Thefuse was fine. Fuse #8 30 amp
All these are in the underhood fusebox.
Working fine now, just going to have to keep an eye on it
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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05-19-2009, 11:45 PM
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#18
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GLS member
Join Date: Nov 2008
Location: ohio
Posts: 1,460
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i just dont see why mine runs so hot in the first place...
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05-20-2009, 02:10 AM
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#19
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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Quote:
Originally Posted by Redog
Just realized that with the DHP PCM the fans kick on at 186*
The sensor's only $18
Part number 36403 at Advance Auto Parts
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You do realize that the same sensor is used for both the gauge and the fans...
__________________
Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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05-20-2009, 02:56 AM
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#20
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Quote:
Originally Posted by Cliff8928
You do realize that the same sensor is used for both the gauge and the fans...
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Yes, after reading some more post and other threads if the sensor wasn't working, the gauge wouldn't be working
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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