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A/C controls dysfunction.

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Old Mar 23, 2026 | 09:42 PM
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Default A/C controls dysfunction.

I recently updated my c3 engine and installed a new ac compressor. Now that its charged, when i slide the controller **** to ‘Max’ it turns the compressor off. When slide back to the off position, it turns on. I switched the wires around on the compressor unit but it made no change. Any help would be greatly appreciated.





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Old Mar 23, 2026 | 10:15 PM
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I'm going to throw out a wild guess that your car is 78 and up.
77 up electric switch under the console is held together with a plastic rivet. Just like the vacuum switch.
Anyway. My plastic rivet broke. My controller also did strange things. You might wish to pull that control assembly out and inspect.
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Old Mar 27, 2026 | 11:13 PM
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Originally Posted by 4-vettes
I'm going to throw out a wild guess that your car is 78 and up.
77 up electric switch under the console is held together with a plastic rivet. Just like the vacuum switch.
Anyway. My plastic rivet broke. My controller also did strange things. You might wish to pull that control assembly out and inspect.
Yes, mine is a 79. Ill check for the broken rivets. Thanks for the input!
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