C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old May 30, 2010 | 11:41 AM
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Default 1970 Plenum Door.

OK, I’ll try this question. Is the plenum door in the passengers’ kick panel supposed to be open or closed in the OFF and MAX A/C position, or, should it be open?

Last edited by Apocolips; May 30, 2010 at 03:10 PM.
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Old May 30, 2010 | 03:11 PM
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ttt
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Old May 30, 2010 | 03:23 PM
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In Max it should be closed so you recirculate the air in the car.
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Old May 30, 2010 | 03:28 PM
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Originally Posted by ...Roger...
In Max it should be closed so you recirculate the air in the car.
That stiinks, mine opens when you start the car in the OFF or MAX A/C position then closes when BI-Level and Vent is selected.
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Old May 30, 2010 | 06:51 PM
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Originally Posted by Apocolips
That stiinks, mine opens when you start the car in the OFF or MAX A/C position then closes when BI-Level and Vent is selected.
In MAX AC the lower door should be open and the upper (outside air intake ) door should be closed which then allows recirculation of the cooled cabin air back into the fan intake.
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Old May 30, 2010 | 06:57 PM
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Originally Posted by Hammerhead Fred
In MAX AC the lower door should be open and the upper (outside air intake ) door should be closed which then allows recirculation of the cooled cabin air back into the fan intake.
I haven't checked the upper door but the lower "kick panel" door is open when power is off or in MAX A/C. I checked it today because there was a lot of hot air coming from there with the system in the off position.
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Old May 30, 2010 | 07:50 PM
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Originally Posted by Hammerhead Fred
In MAX AC the lower door should be open and the upper (outside air intake ) door should be closed which then allows recirculation of the cooled cabin air back into the fan intake.
Sorry ... brain fart....Fred is correct the door "opens" in the MAX position,I think its actually called a "recirc" door in the manuals.
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Old May 30, 2010 | 09:30 PM
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Originally Posted by ...Roger...
Sorry ... brain fart....Fred is correct the door "opens" in the MAX position,I think its actually called a "recirc" door in the manuals.
I appreciate the help. That's one less thing I have to try and fix. Ya'all have a great weekend!!!!
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