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Old 09-01-2012, 05:18 PM
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Be sure the temp/blend door is closed and not heating up the refrigerated air as it passes through the ductwork. If all is well there then you will need to take a good hard look at the rear system.
I have found that the rear system tends to gather debris as the hoses are at the lowest point in the system, also expansion valves can stick, or fail for no apparent reason.
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