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Old 01-10-2010, 02:51 PM
jennkent5454 jennkent5454 is offline
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A/C & heater vacuum line problems

2003 f150 5.4l Fx4---
I am wondering if the black vacuum line that runs from near the battery through the fire wall, across the top of the A/C, is the one that controls the direction of the air flow from floor, defrost, or panel?

Mine blowing in defrost only so I'm guessing it's a vaccum line?
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Old 01-20-2010, 09:01 PM
jennkent5454 jennkent5454 is offline
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EDIT: SEE POST BELOW THIS ONE






This is the Vacuum Connector End View—Electronic Automatic Temperature Control

Click the image to open in full size.

1. NOT USED
2. RED-PANEL/DEFROST DOOR
3. BLUE-PANEL/FLOOR DOOR
4. BLACK-SOURCE VACUUM
5. WHITE-AIR INLET DOOR
6. YELLOW-PANEL/FLOOR DOOR

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Old 01-20-2010, 10:01 PM
jennkent5454 jennkent5454 is offline
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THIS MAY ALSO HELP



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Old 01-25-2010, 08:00 PM
jennkent5454 jennkent5454 is offline
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IT IS FINALLY FIXED!!!!!!



I changed the 4 o rings inside the EATC or head unit. $2 for parts.

I followed these instructions!!!!

Repaired my EATC module today. - MercuryMarauder.net Forums



thanks JACook
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Old 01-25-2010, 09:47 PM
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steve(ill) steve(ill) is offline
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thanks for the update. always heard that was an expensive repair. sounds like its pretty cheap if you take the time to dig in. wonder if the manual system has o-rings between the ports ???
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Old 01-26-2010, 12:46 PM
GalvYank GalvYank is offline
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I'm going to check to see if this is what's causing my automatic climate control to not blow at all, unless it feels like it. Thanks for the info.
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Old 01-26-2010, 12:46 PM
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04, 1997, 1999, 2003, ac, air, conditioer, controls, f150, ford, heater, hoses, line, lines, vacuum

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