Automatic Hubs not working

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Oct 19, 2016 | 09:44 PM

Rus01

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Mountain Pass

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Automatic Hubs not working

I have a 2008 F350 and my automatic hubs won't work, also when I turn the AC on there is heat coming out of one side of the vents.
Im assuming this is a vacume leak somewhere but my vacume pump doesn't run steady? I thought if there is a vacume leak then your pump should run steady??

The 4X4 works fine by locking in the hubs

Oct 20, 2016 | 04:53 AM

redford

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From: Stephensville WI

So the leak is large enough to incapacitate ESOF and the heating system, but not large enough to defeat the vacuum pump.

Does that sound about right?

Oct 20, 2016 | 02:04 PM

AZLugz

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The problem on the AC may be separate, I had that on my 09 and it was a blend door motor

Oct 20, 2016 | 02:40 PM

Rus01

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Mountain Pass

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Quote:

Originally Posted by redford

So the leak is large enough to incapacitate ESOF and the heating system, but not large enough to defeat the vacuum pump.

Does that sound about right?

I'm guessing that could be right i have no clue.
What about the vacume pump solinoid?

Oct 20, 2016 | 02:51 PM

Rus01

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Mountain Pass

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Quote:

Originally Posted by AZLugz

The problem on the AC may be separate, I had that on my 09 and it was a blend door motor

How hard is that to get at?? Is there any links how to get that out?

Oct 20, 2016 | 02:59 PM

AZLugz

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Mine was fixed by the dealer as part of another issue that was covered and they said caused it, but I was able to find a couple youtube vids on it in case I had to do it. When I got the truck back after the other repairs, my son was with me and it was hot so I turned on the ac and the drivers side was cool but the pass side was blowing warm. had the dual system in that one too.

Oct 20, 2016 | 09:23 PM

cabrera1818

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I had this same issue. The vacuum line had melted on the right side as it went frown next to the exhaust. The A/C would shoot up on the windshield when not working properly. Replaced the line and everything works great now. Good luck