No air coming out of dash vents

Asked by Apr 26, 2014 at 09:29 PM about the 1997 Chevrolet C/K 3500 Cheyenne Crew Cab LB RWD

Question type: Maintenance & Repair

AC not working.  No air coming out of dash vents.  Can hear fan running.  Am getting heat when on heat out of floor vents. Suggestions on remedy?

3 Answers

105

there is a valve that open and closes to direct which source the air comes from it is either stuck or the vacuum that switches it is disconnected somewhere the valve will be under the dash

4 people found this helpful.

thanks..I will check it out. Had dash plate out few weeks ago. May have accidently disconnected the vacumn

105

it may also be electric but is so if when you check it just switch from heat to a/c you should hear it switch the valve usually do the switch it just controls a flap in the venting system http://youtu.be/embUVHD3O4o

2 people found this helpful.

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