Question about 1996 Ford Ranger SuperCab

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1996 ford ranger air hissing noise coming from under the dash

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This could actually be a vacuum leak since your climate controls are vacuum controlled. Listen to seeif it sounds like it is coming from the center of the dash area around the control or further to the right. sound can play tricks on you but this would most likely cause unless you only hear it when the blower is on. Then it would be a leak in the blower area.

Posted on Nov 12, 2009

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More that likely the vacuum supply hose to your heat/ ac controls is leaking or, one of the vacuum motors is unhooked or ruptured. Use a small piece of hose, if you have any, start the engine, then stick one end of the hose up to your ear and search around under the dash with the other end. Keep moving the hose until you isolate the spot where the noise is loudest.(cheap stethoscope). Use a mirror if you cannot physically see the area. That is where you will find your leak. TJ

Posted on Nov 12, 2009


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