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Old 12-18-2016, 12:52 PM
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Default heat

I have a 96 chevy blazer, im having problems with the heater it only blows hot air through the defrost vents, i try switching to the floor or other settings and nothing happens, what can the problem be?
Old 12-18-2016, 12:56 PM
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there is a door inside the heater box on the drivers side , when this door is inoperative it defaults to blowing out the defrost....check its actuator or the door door shaft broke and I fixed it by using a dremel to cut into the box and remove the door . Do a search on this site and all the info should come has happened to many members.
Old 12-18-2016, 06:46 PM
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You could also have a vacuum leak. Which put it in default settings, defrost
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