Ac stuck on high - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 08-10-2012, 01:03 PM Thread Starter
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Ac stuck on high

Bad luck this week with the truck. My fan is stuck on high. I can adjust temperature but not fan speed. It also stays blowing even when I turn the air off it just moves to the defrost vents on top of the dash. The only way to turn it off is to shut the truck off. Any ideas what could be causing this?

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post #2 of 5 Old 08-10-2012, 03:47 PM
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Does the display change on the A/C control head if you lower the fan speed? If it does change but the fan doesnt, it could be a bad blower speed resistor, but since you said the air goes to defrost, it sounds like the A/C control head itself.

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post #3 of 5 Old 08-10-2012, 03:54 PM Thread Starter
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Yes the display changes but fan speed does not. Temp changes also.

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post #4 of 5 Old 08-10-2012, 07:30 PM
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Blower Problems

Hello, your symptoms sound similar to mine. Hope this helps.

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post #5 of 5 Old 08-11-2012, 08:29 AM Thread Starter
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Quote:
Originally Posted by rr06psd View Post
Blower Problems - Ford Powerstroke Diesel Forum

Hello, your symptoms sound similar to mine. Hope this helps.

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Thanks! Ill look into that

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