Hvac problems defrost for any setting only - Ford Powerstroke Diesel Forum
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Old 06-24-2014, 06:17 PM
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Hvac problems defrost for any setting only

Hello all, my 03 f-350 crew cab 7.3 is only putting ac and heat through the defrost. I know there is a leak somewhere but I'm having a hard time finding where. I know my fuses are all good, the vacuum pump works but runs constantly, it had auto hubs but swapped them to manual hubs. Now there is a large cannister behind my battery on passenger side that has two lines of the pump going to it. If it take the plug of that holds both lines, if I plug the line closest to fire wall I think it goes to a black line next to a red line, the pump gets vacuum and turns off. It looks like this : where could the line that's leaking be? Thank you all.
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Old 06-24-2014, 06:30 PM
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When converted the hubs did you remove and cap any related lines?
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Old 06-24-2014, 06:39 PM
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Yes and this problem didn't start till this year a couple years after swap
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Old 06-24-2014, 06:59 PM
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Check this thread out....

Vacuum Lines?
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Old 06-24-2014, 07:13 PM
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Thank you! I did notice that solenoid that it had lines comin out if it but I didn't unplug it because I was having a hard time getting the plug out with everything else in the way. I will try unplugging it and plugging the feed line when I tear into it again
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