Rear fan airflow issues - Ford Powerstroke Diesel Forum
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Old 02-28-2014, 01:43 PM
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Rear fan airflow issues


I have been chasing down gremlins in my rear ac and one of them is that the air coming out of the 4 rear ducts seem very low (in volume) when the fan is on the high position. I can hear the fan spinning loudly in the rear but the air seems just like a slight breeze out of the front 2 vents and the rear are only slightly stronger. I had a 00 Ex back in 07 and don't remember how fast the air came out but in my 06 Explorer and 03 Navigator when the rear fan was on high I could feel a good blast coming out all rear vents. What should I start to look at?
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Old 02-28-2014, 02:25 PM
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Check for air flow that comes out behind second row seats, assuming you have the selector going to the upper vents only. If its high then it's an air door issue. I've never opened that system up myself but should be easy to fix.

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Old 02-28-2014, 02:29 PM
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another thing is see if you can detect a change in fan speeds using the selector
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