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AC question

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  #1  
Old 09-26-2012, 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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  #2  
Old 09-26-2012, 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 09-26-2012, 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 09-26-2012, 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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  #5  
Old 09-27-2012, 06:57 AM
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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 09-28-2012, 03:18 PM
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No, it blows normally but only on high
 
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Old 09-29-2012, 07:39 AM
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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 10-17-2012, 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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