Recently the vent selector began to stick then the next day the vent would change from face to floor or to deforster
The mode selector is actuated by Bowden cables. When you turn the selector switch, the cable winds on a spool and that rotates the mode door. the cable may have come off either end. You need a U shaped set of radio puller tools that go in the 4 holes in the front of the radio. Then you slide the Us to the outside to compress the clips and allow to pull the radio out. Then there are 4 screws to remove to remove the finish bezel. Then 3 screws hold on the climate control head.
With the radio out, you can rotate the selector knob and see what it is doing. If you remove a cable, rotate it counterclockwise fully before disconnecting it.
You can buy a whole head for $10 used at car-part.com. look on page with * for lowest cost part. You can use 2000-07 contol head.
Please rate, thanks
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Air distribution operating cables
The air distribution switch operates with two Bowden cables. The cables operate the air distribution valves in the heater housing.
To remove and install the cables, the rotary switch must be turned as far as it will go to the left. The air flap mechanism engages easily in this position, making the installation of the cables easier.
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Installation
Remove the bezel with heater/air conditioning controls (continued).
NOTE: To install the Bowden cables, turn the rotary switches as far as they will go to the left. The mechanism engages easily in this position.
NOTE: The Bowden cables are identical for RHD and LHD vehicles, although they are fastened to the air flap operating mechanism with the reverse side of their connectors.
Install the components in reverse order.
SOURCE: AIR FLOW STUCK IN DEFORST VENT WILL NOT SWITCH TO FLOOR OR AC VEN
The "MODE" door works off of an electric motor.
SOURCE: air conditioning on a 2000 chevy impala
If it will not switch to any different positions,and you did not have this problem prior to repair.Check for a leaking vacuum line to the control unit.The line should run through the firewall to the control unit.Good Luck!!!
SOURCE: dash vents not working
I hate to question your intelligence, but are the vents open with the knob below them?
SOURCE: 1999 Chevrolet Suburban ac selector door motor.
it should be under dash next to gas peddle on left end of heater box not that hard 2 screws and a plug. its called heater blend door actuator.
SOURCE: climate control system only blow air out defrost vent
there is a good chance that you blend air door is stuck closed over your heater core and therefore not allowing the heat to flow, also your door that opens and close your direction of flow from the floor ,das,vent and defrost.your going to have to remove the lower cowling of the dash on the passenger side analso some of the center dash to actually check to see if the cable,servo motors. are acuating the doors.the issue could be just a stuck door or a misaligned cable or that it came off. that falls under the mechanical side of probabilities. electrical would most likely be a faulty selector switch or a servo motor
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