Vent Controls in 97 Astro Van


Old 06-02-02, 07:50 PM
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Vent Controls in 97 Astro Van

My 1997 Astro AC/Heater control vents are always in the defrost mode. The control doesn't move to the different vents. Question is, Is the control vacumm controled or electric? Could it be as simple as a fuse?
The heater control gives heat, and the AC setting gives cool air, but the vents don't change with the different setting.
Will I have to remove the whole dash?
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Old 06-02-02, 09:46 PM
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The controls are vacuum operated.

Do you hear a hissing sound coming from under the dash?
Old 06-03-02, 04:19 PM
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No, there is no noise of vacumm hissing at all. If it is vacumm controled, wouldn't it effect the engine? Everything else runs fine?
Is there only one vacumm line coming through the firewall where I could check?

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