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Old 10-02-2016, 04:24 PM   #5
Stealthee
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Re: 99 malibu...temp gauge & AC

If the ECU does not see voltage from the coolant temperature sensor it will disengage the AC clutch. It is a failsafe. It basically sees no voltage as an overheat. When it overheats it will disengage the AC clutch as well.
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