Question about Chevrolet Silverado

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I have a 1999 chevy silvarado my heater\AC vents do not work properly anymore. Everything comes out on the floor.

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  • geraldpapa20 Jul 26, 2008

    already checked fuse. Again the AC/heater works but everything comes out on the floor. I was wondering if it's a servo motor or vacuum problem

  • geraldpapa20 Jul 26, 2008

    already check the selector switch. When I go from the face to the defroster you could the something changing but the air still comes out on the floor.

  • geraldpapa20 Jul 26, 2008

    I have a 1999 chevy silvarado my heater\AC vents do not work properly anymore. Everything comes out on the floor.

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5 Answers

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  • Master
  • 417 Answers

Hi,

you may have a crack in your vacuum storage canister under the hood, Its a medium sized plastic canister that stores up vacuumn pressure and if its cracked can cause irratic accessory operation, might want to check that also.

J

Posted on Jul 26, 2008

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  • Master
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I would suggest to check the selector switch. If there is a loose connection there you will not be able to select the direction where the air should flow.

Posted on Jul 26, 2008

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  • Master
  • 1,665 Answers

Heater\AC drain pipe may be clogged.

Posted on Jul 26, 2008

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  • Master
  • 2,028 Answers

Besides the selector switch, connections, and wires, also check the motor the runs the aperture arm that open and closes the air flow directional, check the aperture arm, they will sometimes come loose, and check the air flow directional to make sure it's not jammed,out of place, or blocked by something that may have fallen. The air flow directional is the flap or door that is inside the base of the duct system that directs the air to the area selected.

Posted on Jul 26, 2008

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  • Ryan Rogers
    Ryan Rogers Jul 26, 2008

    You will find all of this under the dash, at the center, where the heater core is. This is the base of the duct system.

  • Ryan Rogers
    Ryan Rogers Jul 26, 2008

    If you can hear the motor for the directional, then I would say the arm has come loose.

  • Ryan Rogers
    Ryan Rogers Aug 02, 2008

    Have you checked the flow gate?

  • Ryan Rogers
    Ryan Rogers Aug 02, 2008

    The directional.

  • Ryan Rogers
    Ryan Rogers Aug 02, 2008

    Anything?

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  • Chevrolet Master
  • 19,396 Answers

Check fuse,
Get replacement here:
Chevy Silverado 1500 Air Conditioning

Posted on Jul 26, 2008

  • Ginko
    Ginko Jul 26, 2008

    Or call 1-800-378-7566 to get a quote on new or used AC for your car

  • Ginko
    Ginko Jul 26, 2008

    Check also that the vents ducts are not obstructed and that the duct for upper vents is not lose

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1 Suggested Answer

fyrebyrd1
  • 121 Answers

SOURCE: heat/air vent on working

mode door motor is bad.

Posted on Nov 16, 2008

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