Question about 2001 Ford F350 Super Duty SuperCab

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Hot air comes out of the fresh air vent whether or not the switch is turned on. same when the a/c is turned on.

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Sounds like some disconnected vacuum lines, or a faulty controller. Look for loose 1/4" rubber hose floating around under the dash.

Posted on Sep 04, 2009

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you may have an air mix motor problem or a mode control motor problem. there is a test you can do that may help: 1. turn the ignition switch on. 2. turn the fan switch off. 3. press the recirc control button to select recirc (recirc indicator light comes on.) 4. press and hold the recirc button to select fresh (recirc indicator goes off). Continue to hold the the button down until the recirc indicator comes on for two seconds and then goes off. If the system is okay, the recirc indicator will stay off. If there is a problem, the recirc indicator blinks a code to indicate a fault. 1 blink=air mix control motor/circuit fault. 2 blinks= mode control motor/circuit fault. 3 blinks= evaporator temp sensor circuit fault. In case of multiple problems, the recirc indicator will only blink the code with the least number. write back if this test shows a code and we'll go from there.

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