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Old 05-08-2007, 02:08 PM   #1
JayD
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Fan only works on 4th Setting

I have an 02 SVT with 50k miles and for about 6 months my fan has only worked on the highest setting. It hasn't bothered my too much until now since it is starting to get hot outside. The A/C coil will turn on at fan setting 1, 2, and 3 but once I go to 4 the coil (and A/C light) turns off. So getting conditioned air is a problem since I have to let the coil get cold on setting 3 with the fan off, then switch to setting 4 to have cold air blast at me for a few seconds then get warm because the coil turns off. I'm not confident the resistor pack is the problem either, because I had a friend test it with an ohmmeter. Is this something I can fix myself? I don't know much about cars but my roomates do.


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Old 05-08-2007, 02:53 PM   #2
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By using the search button I found this :

as far as the a/c fan, thats easy. pop your glovebox and look behind it. youll see the blower motor and on its left side is a little rectangular box, usually blue. its the motors resistor pack. reason it works on 4 is thats direct 12v to the motor, the other 3 levels run through the resistor pack.
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Old 05-08-2007, 02:55 PM   #3
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Quote:
Originally Posted by mpcv2000 View Post
By using the search button I found this :

as far as the a/c fan, thats easy. pop your glovebox and look behind it. youll see the blower motor and on its left side is a little rectangular box, usually blue. its the motors resistor pack. reason it works on 4 is thats direct 12v to the motor, the other 3 levels run through the resistor pack.
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Old 05-08-2007, 03:07 PM   #4
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Yep, resistor. 3M5Z-18591-BA From Ford.....next, lol
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Old 05-08-2007, 06:23 PM   #5
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It will always run on high, thats a safety feature.
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Old 05-09-2007, 09:56 AM   #6
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> It will always run on high, thats a safety feature

More like an accident of design. High speed doesn't run through the resistor so that the fan motor gets full voltage and runs at max speed.
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Old 05-09-2007, 10:50 AM   #7
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Thanks. But why would the comrpessor turn off on high but remain on at a lower setting?
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Old 05-09-2007, 05:31 PM   #8
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I've had that problem ^

You need to replace the switch mechanism for the vents. When you pull it out, if it is like mine was, you'll see that parts of the mechanism is melted. It's a pretty easy fix once you have the part.
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Old 05-10-2007, 01:36 PM   #9
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The resistor pack fixed all my problems. Thanks, you guys are great. The Dealer was out of the pollen filter though and I should probably change that. Does anyone have a link to how to change that out?
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Old 05-10-2007, 01:38 PM   #10
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ha thats funny my number 4 doesn't work.
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