A/C pressure Problem - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-30-2005, 07:53 PM   #1
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Default A/C pressure Problem

Okay my exterior temperature was flashing on my ECC so i ran the diagnostics in techinfo and read a code 66-low freon. i put a gauge on and read 65psi. i can hear the compressor cycling on and off. so i go to put freon in and im shaking the can for what seems like a hour and it never took any of the freon nor did the bottle get cold. the whole time the compressor is still cycling on and off. whats the problem???

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Old 10-30-2005, 08:07 PM   #2
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Probably the exterior temp sensor on the radiator support.
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