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

A little A/C help

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Old Aug 17, 2009 | 03:03 PM
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Default A little A/C help

looking for some input on an a/c problem, it blows cold for about 20 minutes and thats it, im thinking moisture or air in the system and after the 20 either the orafice or something else freezing up,comments?

Last edited by kimmer; Aug 17, 2009 at 03:06 PM.
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Old Aug 17, 2009 | 03:51 PM
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Sounds like your evaporator core is freezing up....
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Old Aug 17, 2009 | 07:55 PM
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There is a low pressure switch..which should cycle the compressor clutch off and on depending on pressure...if the compressor runs continuous that alone can cause the evap to "freeze". Does the compressor ever cut off during the 20 minutes?

Last edited by TWISTERUP; Aug 17, 2009 at 07:58 PM.
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Old Aug 17, 2009 | 08:04 PM
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See if the comp is still turning when it stops working.
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