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Unit is fully charged and has had system blown clear with Nitrogen but it still comes & goes almost like freezing up.  When it cools it really cools great but then all of a sudden it just stops, compressor still running. I have had everything checked but some are saying something about removing the dash to get to the problem. They can't be specific when asked about the culprit. When gauges are hooked up all pressures are great until the problem arises. It seems like there is a floating restriction that just comes around and gets lodged in the orifice & then when the unit is cut off it just floats back as the pressure equalizes.  Am i on the right trail or am i just digging too deep?  Anyone ever had this problem before? Please email me @ jamesrombold@earthlink.net if you have any ideas  

Makes sense to me, seems like there must be some debri in the system. I would have it completely purged and recharged, perhaps whats in ther may come out.