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Old Sep 26, 2012 | 06:04 PM
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AC question

My 2002 superduty diesel 4x4 had the ac fan switch (4 position) quit. Only works on high. Is it the switch or is this a sign that the ac is low on charge?
 
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Old Sep 26, 2012 | 06:15 PM
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It's most likely the blower motor resistor. It is located on the firewall by the blower motor, it's red and white with a connector going to it. Mine was bad when i got my truck. The new part from ford was like $22.
 
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Old Sep 26, 2012 | 07:40 PM
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Thanks for the reply. I'll check it out tomorrow and repost my results
 
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Old Sep 26, 2012 | 08:26 PM
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Does it only blow out the defroster and only on high? If so, it is a vacuum leak.
 
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Old Sep 27, 2012 | 06:57 AM
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From: St Louis
Originally Posted by redford
Does it only blow out the defroster and only on high? If so, it is a vacuum leak.
Those are two separate and different issues with different causes.

See FAQs, link is in my signature.
 
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Old Sep 28, 2012 | 03:18 PM
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No, it blows normally but only on high
 
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Old Sep 29, 2012 | 07:39 AM
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From: St Louis
Originally Posted by Haoleman
No, it blows normally but only on high
Then go READ the FAQs as previously instructed.
 
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Old Oct 17, 2012 | 07:54 AM
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It was the resistor pack. A real bugger to get out as the main power lead in the plug welded itself to the resistor. $23 for the resistor and $15 for a new plug and all is well. Thanks!!!
 
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