C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Manual climate control recirculate

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Old Jan 23, 2025 | 08:56 AM
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Default Manual climate control recirculate

So is the only way to get the manual climate control to recirc is setting it on max ac? It’s been single digits here and the heater doesn’t really do it on the regular heat settings, but on max ac it works great. Guess I could switch the vacuum lines around on the selector?
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Old Jan 23, 2025 | 09:35 AM
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On the C68, the only way to get it to close the recirc is to set the temp waaay down. I think 65 or maybe down to 60 (which is the min temp a.k.a. MAX AC).

I'd considered trying to figure a way to make it close when I wanted it to. a was going to put +12v on a switch to the specific solenoid in the programmer to close/open it.
I haven't gotten that far yet.
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Old Jan 23, 2025 | 10:23 AM
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Originally Posted by 2011KLR
On the C68, the only way to get it to close the recirc is to set the temp waaay down. I think 65 or maybe down to 60 (which is the min temp a.k.a. MAX AC).

I'd considered trying to figure a way to make it close when I wanted it to. a was going to put +12v on a switch to the specific solenoid in the programmer to close/open it.
I haven't gotten that far yet.
I have the C60, not C68
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Old Jan 23, 2025 | 03:55 PM
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Yah. I saw that. I guess I didnt type out what I was thinking in my head... That would be that the C60 and the C68 both only close the recirc vent when the temp is set to its lowest setting.
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Old Jan 25, 2025 | 10:43 PM
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I was thinking about this very issue today as I was driving around behind a particularly smelly car.
The C60 is all vacuum but I'm thinking a fella could plug off the required hose and wire the fresh air door closed.
I haven't opened the manual to look at this yet but I'll get to it after football tomorrow.
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