How to I test heater/AC actuator? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 10-16-2010
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How to I test heater/AC actuator?

What should the actuator do when I go to test it? I have mine detached from the top of the heater box on my 97 Ranger, but I have it plugged in to the electrical harness. Should the D shaped stem be moving when I turn the temperature selector, or should it be moving when I do something else? Should it happen right away? Right now the D shaped stem is not turning at all no matter what I do.
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Old 10-17-2010
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I just looked at mine visually. With it still attached to box and plugged in. On my truck there is a little door thong to the right of it. Just change the selector on the AC controls and watch the door to see if it moved
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Old 10-17-2010
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Isn't the door you're referring to the one controlled by a vacuum diaphram? The blend door is below the actuator inside the heater box.
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