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

Having Problem With My A/C Heater control

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Old Oct 21, 2015 | 10:57 AM
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Doggie Dawg's Avatar
Doggie Dawg
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Default Having Problem With My A/C Heater control

I am having a problem with my A/C & Heat controls on my 96 Vette.
I cant get my heat to turn on.

I tested the vacuum lines coming out the firewall to the 2 way check valve next to my fuel rails. One line will hold vacuum and the other one will Not hold any vacuum.

Has anyone faced with this problem?
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Old Oct 21, 2015 | 11:16 AM
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look on youtube there is a video to show how the climate control does a self test
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Old Oct 21, 2015 | 11:47 PM
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Here's how to do A/C diagnostics on 1990 and newer cars:

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