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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

08 Air Conditioning

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Old Jul 7, 2012 | 07:56 AM
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ckscape
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08 Air Conditioning

I've got an 08 F350 - My AC will only work if I've got it on setting 4. If I try to use it on settings 1-3, nothing happens, but as soon as I set it on 4 it blasts the cold air.

Anyone have any similar probs? Thanks for any help, fellas.
 
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Old Jul 7, 2012 | 11:18 AM
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Mine will stop working altogether once in a while. I just pull over, turn vehicle off and then back on and it seems to reset itself. Does not sound like the same issue but I too have had a weird issue with the AC.
 
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Old Jul 7, 2012 | 02:23 PM
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Hi ckscape, welcome to FTE!

I know that on most vehicles I've seen this on the culprit is the resistor that controls the speed of the blower motor. I just checked on Tousley Ford Parts' website and they do list a blower motor resister for your truck, and this should be your problem.

Not sure how hard the install is though, hopefully a tech can chime in. If you perform repairs yourself you can get the shop manual at www.alldatadiy.com or the official one at www.motorcraftservice.com.
 
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Old Jul 9, 2012 | 12:22 AM
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Should be blown thermal fuse on blower resistor assy. Replace the blower resistor, they are not real expensive.
 
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Old Jul 9, 2012 | 12:25 AM
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Just remembered that it may be cause by excessive amperage draw from the blower motor. Make sure there is no blockage and if it happens again you may need a new blower motor as well. Just my experience when I used to do A/C at a Ford Dealer.
 
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Old Jul 9, 2012 | 05:50 PM
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Originally Posted by jasfaa
Mine will stop working altogether once in a while. I just pull over, turn vehicle off and then back on and it seems to reset itself. Does not sound like the same issue but I too have had a weird issue with the AC.

If you ever figure this crap out let me know please. Under warranty dealer replaced the eatc 3 times. Now at 51k miles, it will shut off for about 5 seconds then kick back on. I pray the whole 5 seconds
 
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Old Aug 21, 2012 | 12:37 PM
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A/C ?

Mine didn't come with an Air Conditioner, at least not a proper Ford A/C anyway.

Checked out 7 different ways from Sunday since I owned it. Ford should be ashamed.
 
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