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Possessed Electric Fan?
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=50535		 Page 1 of 1
Author:  VMKJCRD [ Thu Feb 25, 2010 8:06 pm ]
Post subject:  Possessed Electric Fan?
For some reason my electric fan (one we see threw the grill) is possessed. Every time I crank up the crd the fan turns on at full blast even with a left over night cold engine and it just keeps on running and only stops when I turn off the engine. Funny thing is that in the summer in 95 degree weather it never turned on and I was even wondering if the fan worked… Now I can’t get the dam thing to shut off. It just keeps on running at fool blast.
I tried disconnecting the battery and left it to sit over night disconnected hoping it would fix the problem but its still the same. I’m afraid that if I leave it running it will just blow the motor of the fan or damage something else.
Would I be able to disconnect the fan or maybe pull a fuse out to stop it? Does this fan have anything to do with the AC? What is the purpose of this fan?

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Author:  racertracer [ Tue Mar 02, 2010 1:24 am ]
Post subject:  Re: Possessed Electric Fan?
VMKJCRD,

Did you get this resolved?
Author:  danoid [ Tue Mar 02, 2010 5:00 pm ]
Post subject:  Re: Possessed Electric Fan?
Do you have an EVIC? Does it display odd outdoor temperatures? This might happen if the engine thinks it's 110° outside. Could be a bad ambient temperature sensor.

You will want a properly functioning electric fan come summer. Mine was disconnected by a less than intelligent dealership while repairing a brake line (the passenger front brake line goes round by way of the bumper!). The result was no cold air using air conditioning at less than highway speeds.
Author:  VMKJCRD [ Tue Mar 02, 2010 6:00 pm ]
Post subject:  Re: Possessed Electric Fan?
Well some how it fixed itself... pretty strange. I disconnected the battery for an hour again and unplugged the ECU just for the hell of it and when I plugged every thing back and connected the battery it was back to normal. I also checked to see if the AC was blowing cold air. Every thing is fine now.

:shock:
Author:  danoid [ Tue Mar 02, 2010 6:24 pm ]
Post subject:  Re: Possessed Electric Fan?
Still could be an ambient temperature sensor. I replaced one on the wife's Pontiac once. It was reading the outside temperature as too high so the automatic temperature control was freezing her out. I replaced the sensor only to find out that the vehicle was attempting to compensate for a sensor it knew was wacked. Now the outside temperature was too cold and it dutifully pumped out heat when it was 80° out. Disconnecting the battery for half an hour set it back to the mid range. If it comes back in a few weeks, consider replacing it.
Author:  CRDMiller [ Tue Mar 02, 2010 8:50 pm ]
Post subject:  Re: Possessed Electric Fan?
Is the electric fan supposed to operate without the use of the air conditioner?

Because mine has NEVER come on without the ac on.
Author:  journeyjim [ Thu Mar 04, 2010 6:59 am ]
Post subject:  Re: Possessed Electric Fan?
My understanding is the electric fan will come on, if the engine fan can't provide enough air, as in hill climbing with a tow, or things like that. It will come on with the a/c in stop and go situations, I don't know if it turns off at highway speeds though.
When I've drove mine in the summer heat it was on with the a/c, and after stopping and turning the a/c off, and letting it cool down, it would cycle. :mrgreen:
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