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Old 07-17-2013, 07:52 PM
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maine7777 maine7777 is offline
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Vehicle: 2012 Ram 1500 QC ST
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Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
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Default That is normal

This is normal just like a window ac unit that cycles on and off. The compressor needs to run to compress the refrigerant while cycling in through the system creating cold lines. The blower then blows air over the cold lines creating the cooling effect. The ac compressor electromagnetic clutch is controlled by the computer which talks to the digital control unit (where you set the temperature) and evap sensor over the can bus. Essentially the clutch turns off when the lines are cold enough and then back on when needed.
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