a/c coming out of defrost vents - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 10 (permalink) Old 07-03-2007, 06:04 PM Thread Starter
 
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a/c coming out of defrost vents

i need some help guys...i was driving today, turned on the a/c and nothing was coming out of the front vents. all the cold air was coming out of the defroster vents....whats up with this? thanks!

Jefferson

2001 dodge 6 speed
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post #2 of 10 (permalink) Old 07-03-2007, 08:04 PM
 
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I might be wrong here...but I know on gas engines that when the vacuum lines go out the blower will either end up dumping straight on the floor or through the defrost. Not sure if its the same for a diesel.
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post #3 of 10 (permalink) Old 07-04-2007, 03:42 AM
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Default position for all comfort conditioning equip for several years has been defrost open, it seems to be a fail secure thing.

I am not a fan of scraping the ice off the inside of the windows in the winter.

keydl

93 Dodge /CTD, IC, 518, club cab LE, BHAF, KDP fixed, kelderman air ride
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post #4 of 10 (permalink) Old 07-04-2007, 04:47 AM
 
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check air dampener. could be stuck.
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post #5 of 10 (permalink) Old 07-04-2007, 07:14 PM
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Buddy burned up his vacuum lines on the fire wall of his diesel did the same thing check for vacuum leaks.

2003 F-250 6.0 liter crew cab lariat 4x4 short bed, S&B intake, MBRP 4" turbo back straight piped jones, SCT livewire, : 2 jl audio 12W3V3's with jl audio 500/1, autometer sport comp gauges, 6.5 inch pro comp lift, 37x13.5 Super Swamper M16's
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post #6 of 10 (permalink) Old 07-05-2007, 12:51 AM
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i'm not sure if yours is the same but i had this problem on a 96ish half ton dodge and it was a vacuum leak at the cruise control diaphram which was under the battery on the drivers side.

07 Dodge 5.9 3500 DRW 4x4 QC 6spd:93C_peelo With a few mods.
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post #7 of 10 (permalink) Old 07-05-2007, 10:49 PM Thread Starter
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thanks guys. im at work but ill see what i can do as soon as i can
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post #8 of 10 (permalink) Old 07-06-2007, 01:28 AM
 
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Isn't there a flap in there somewhere that actually switches to direct air flow? I know we had one break in a 90ish GMC gasser and had to replace it, I don't remember if it was like a flap or a switch or what it was, or if a Dodge would even have one?
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post #9 of 10 (permalink) Old 07-06-2007, 05:11 AM
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Vaccuum lines.......Most likely.:Thumbup:

89 w250 project truck
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post #10 of 10 (permalink) Old 07-19-2007, 04:37 PM
 
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I agree! Start at the pump and suck on the lines the one with no vacuum has a hole! Mine was the one going to the cruise conrol! Good luck! easy fix!!
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