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A/C / Heater problems

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Old Jan 16, 2006 | 08:25 PM
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A/C / Heater problems

This morning I turned on my heater (defroster) and for some reason, no matter where I turn the ****, I cant get it to go to the floor heater or dashboard. It's stuck on the defroster?? It turns off, but thats about the only option that works. Any ideas? Is there a motor or switch that needs replacing?
 
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Old Jan 16, 2006 | 10:49 PM
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There are actuators that move the doors that direct the airflow located under the dash behind the ashtray. These are run be vacuum lines...if one got d/c or broke that would cause the problem...that's where i would look first
 
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Old Jan 17, 2006 | 02:35 AM
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Defrost is the default position when there is no vaccum applied. Thus, you most likely need to determine why the HVAC system lost vaccum.
 
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Old Jan 17, 2006 | 05:49 AM
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Originally Posted by Ammon
This morning I turned on my heater (defroster) and for some reason, no matter where I turn the ****, I cant get it to go to the floor heater or dashboard. It's stuck on the defroster?? It turns off, but thats about the only option that works. Any ideas? Is there a motor or switch that needs replacing?
Is this for your 2000 F-350? If so then I will move this post to the Super Duty...but I need to know.

-Matt
 
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Old Jan 17, 2006 | 09:20 AM
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Yes, this is for my 2000 F-350. Is this something I need to take to a dealership? Or something that I may be able to check out on my own?
 
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Old Jan 17, 2006 | 12:16 PM
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Thread moved to Super Duty forum.

-Matt
 
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Old Jan 17, 2006 | 12:22 PM
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So I was searching some other posts, and noticed there was a connection between the 4x4 hub and the air. My seal on on of my hubs is bad. Would this be the problem? When I replace the hub with manual hubs, what is the best way to plug the vacuum?
 
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Old Jan 18, 2006 | 01:49 AM
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It could be from the hub but check under/behind the glove box for a vacuum fitting that can come appart.
 
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Old Jan 28, 2006 | 12:17 PM
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That's exactly what it was! The plug under the glove box must have been disconnected by someone sitting in the passenger seat. Thanks!
 
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Old Jan 28, 2006 | 03:00 PM
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I am having the exact same problem but all the vacum lines are ok I have checked and rechecked the lines and everything seems to be fine. I have checked fuses and they are all ok.I think it happened when I used the ESOF switch for a moment yesterday to get up a steep gravel incline? then turned it off,but when I got home I switched again to 4x4 and 4x4 low with the switch and the hubs engaged? I am suspecting my dash switch went south? what would others opinions be?
 
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