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Q: when 2001 ford explorer is idle ac doesn't blow cold air on 2001 Ford Explorer

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when 2001 ford explorer is idle ac doesn't blow cold air but it does get cold when driving or reeved up..........why does it do that?
(1) Answer
2 things come to mind, low refrigerant and/or a worn compressor. Best thing to do is to put on a set of A/C gauges ( or have a shop so this ) and
see what the idle pressures and then the 2500 rpm pressure are. This will tell you volumes about what your issue is.

here is an A/C diagnostic sheet to help you or your shop:

http://repairpal.com/air-conditioning-diagnosis