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Hey guys,
I own a 1978 Ranger F150 XLT with heat and a/c that worked great until 2 weeks ago. The switch for me to select vent, a/c, hi-lo, heat, and defrost is acting up I think. No matter what I select the air always blows out of the defroster vents. When i get to the a/c position the compressor cuts on. I do notice the flap at the bottom right below the dash doesent move anymore. Vacuum problem?