Fan speed switch doesn't work - Ford Powerstroke Diesel Forum
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  #1  
Old 06-15-2012, 05:07 PM
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Fan speed switch doesn't work

Yesterday when I started the truck, the fan speed knob worked. I drove about 2 miles to a meeting, got out and when I got back in, the knob turns, but the fan speed stays the same. It seems like it is stuck on the high side; maybe 4.

Any tips?

Thanks,

Brad
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  #2  
Old 06-15-2012, 05:44 PM
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that is the default for when the controller goes south
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Old 06-16-2012, 05:51 AM
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How hard is it to replace the controller and what does it cost?
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Old 06-17-2012, 12:57 AM
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Blower motor resistor is most likely what you need.
When it goes bad you only get high speed fan.
It's behind the glovebox.
Try the dealer or Rockauto.com
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Old 06-17-2012, 07:21 AM
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Cool. Ordered one!
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Old 06-22-2012, 06:30 AM
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Got part from Rockauto (fast and cheap - got some filters, too).

Still no workie! Stuck on fan speed 4. Checked harness. Checked connector. Everything looked fine.

What next?
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