is this a mechanical, vacuum, or electrical issue
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1999 Dodge Ram 1500 Question: my heater controls have recently defaulted to the defrost mode only. any clues?
Answer #1G. T. Service Center (4075 Answers) , Stephenville, TX - (254) 638-3236ProfessorG March 15, 2014, 11:35Master
1999 should still have vacuum I believe. Mode door.
Replybigpoppa9, March 15, 2014, 11:43Rookie
can I fix this myself or do I need a professional?
ReplyProfessorG, March 15, 2014, 13:02Master
Check the vacuum hoses and see if one is loose in the engine compartment to the fire wall
Replybigpoppa9, March 15, 2014, 16:42Rookie
I will try that. Thanks for your help.