Defroster!

lomac9

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I used my defroster a couple days ago and havent used it since. Today I turned on my AC which automatically started coming out of the defrost because thats where it was set from the last use. The problem is that I can not get it to switch from that position. The compressor comes on and blows cold cold air. I push all the buttons (face,floor, ext.) but it only will blow out the defrost. All the lights in the display work. Ex. when you push face it lights up on the display it just wont switch from defrost. I have never had any problems with this truck. I just hit 100,000 miles guess this is where the fun starts. Any help would be greatly appreciated
 

JLDickmon

ursus combibo
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you are the proud owner of a broken vacuum line..
(ps: your ESOF hubs aren't working either)

start by running the vacuum lines back from the hubs to the pump (the rattly sounding thing on the r/f fender) if no luck there, the black one that goes inside the cab is the culprit..
 

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