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Old Jun 17, 2007 | 01:52 PM
  #1  
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zman764
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Laughing Gas
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Temp Control

Hey guys, when I turn the ac temp **** to the cold side, or to the hot side, what exactly happens?
My truck is a 97 f150 4x4 4.6L w/ 211k miles.
As long as I have had it I have always had a problem with the heater air getting cold after its been hot and if I just turn the **** up and then back to heat or back it off the of the maximum just a tiny bit it will get hot. But the AC has always worked fine.

Now in the beginnings of our southern summer, on max ac w/ the **** all the way to cold the air stays warm until I "jiggle" the **** and then it will cool off.

So when I turn the **** what exactly happens where might the problem be?

thanks.
 
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Old Jun 17, 2007 | 03:43 PM
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there is an electric motor setting below the dash in the center above the trans hump. this moves a door from hot to cold air. motor is bad or the arm to the door is broke. check old posts for "blend door", etc.
 
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Old Jun 17, 2007 | 06:33 PM
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https://www.ford-trucks.com/forums/6...ght=blend+door
 
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Old Jun 18, 2007 | 09:24 PM
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zman764
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Laughing Gas
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Steve thanks for the link to the past thread, I almost don't want to admit this but half the time i don't even search b/c i never seem to find anything but i do find stuff sometimes.
So in my condition where everything works just when I first start the truck it wanders. Do you think the little white box is broken? I wasn't real clear on that post. But I know I should pop off the black plastic on the tranny hump and find something on the right side near the ac box and watch to see if an actuator arm moves when I adjust temp right?
In addition to that. Here in SC we get 98* days with 93% humidity and with my ac rockin on max its sweet, it blows 27* air and feels awesome. But when I put it on panel and floor it uses air from the outside and it only gets it down to about 40-50 and that just does not cut it. Is there any way I can make it operate on the max setting but blow the air through the panel & floor vent setting?? Thanks
 
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