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Jerry, Auto Mechanic
Category: Ford
Satisfied Customers: 2948
Experience:  Mechanic with over 30 years experience with N.Y.P.D. fleet service division
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i have a1997 ford f150 2wheel drive,6cylinder pickup truck

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i have a1997 ford f150 2wheel drive,6cylinder pickup truck .the temperature control knob does not change the temperature up or down.i have changed the switch behind the knob but that did not help. what could the problem be?.............................
A very common problem on these trucks a a broken blend door shaft . A replacement part that will take care of this permanently is made by a company called Heater Treater. You find info on the part, they come with installation instructions to help you install the part .This the website good luck,
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