1998 Chev S10 Blazer- heater blows air thru the defrost vents and is not heated ?????????????? I have a problem with the heat in my 2004 Blazer. When I trun the control to heat (floor), the defrost (windshield) goes on. There is no heat on the floor and I can hear the defrost working (you know the sound it makes). The heat works fine otherwise but my feet are freezing off! Any ideas? Thanks.
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