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AC blows cold then hot

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Old Jul 9, 2011 | 11:11 AM
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AC blows cold then hot

2000 F250 7.3 diesel
It began doing this last summer. It will blow cold and freeze you out then it gets hot and burns you up. If you step on the gas pedal for a bit, it will go cold again. We have changed high & low pressure switches and added more freon. What else do we need to look into?
 
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Old Jul 10, 2011 | 08:52 AM
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