Question about 1994 Chevrolet S-10 Blazer
I had this problem with my '93 Ford Probe. What happened was the shaft coming out of the vacuum solenoid was onnected to a plastic arm for the valve that rotated for where you want the air to go. This plastic arm was broken over the years of constant use so I make a small metal one.
Posted on Nov 21, 2008
When the air only blows out of the floor and defrost regardless of the selected route, it is defaulting. It means there is a problem. Most likely a vacuum leak. I have a 97 S10 that this happened to. I replaced a few vacuum hoses under the hood..One of which was not connected to anything, nor could I figure out where it was suppose to be connected, so I just plugged it..Added a little freon, and the air works wonderfully. Hope this helps..
Posted on Sep 20, 2008
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