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1999 Dodge Ram 1500 Question: my heater controls have recently defaulted to the defrost mode only. any clues?

 

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bigpoppa9, 5.2L V8, Muskegon, MI, March 15, 2014, 11:03
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is this a mechanical, vacuum, or electrical issue

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  • Answer #1

    G. T. Service Center (4056 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG March 15, 2014, 11:35
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    1999 should still have vacuum I believe. Mode door.

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    bigpoppa9, March 15, 2014, 11:43
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    can I fix this myself or do I need a professional?

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    ProfessorG, March 15, 2014, 13:02
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    Check the vacuum hoses and see if one is loose in the engine compartment to the fire wall

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    bigpoppa9, March 15, 2014, 16:42
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    I will try that. Thanks for your help.

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