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Message: [QUOTE="Lethalthreat7.3, post: 744151, member: 10651"] Running compressed air in. R-134a/PAG oil system for twenty minutes is one of the worse things you can do for the system. Try running the compressor discharge air into a rag for that time period and see just how much moisture is there. Moisture and pag creates hydrofluoric acid and this literally dissolves the internal aluminum components. I have seen compressors that look like a torch has been put to the aluminum and everyone knows what happens with that. I still believe you have some type of blockage. If you used compressed air i would be willing to bet it is the accumulator. They do not take to flushing because of the desiccant and adding moisture from compressed air multiples the problem. Then there's the orifice tube that is sure to be clogged. If you know for sure the hoses are restricted( try changing the suction with the discharge hose just to see if it will feed. Also, what are your exact pressures? Outside air? Cab air? Discharge air? With some more info we may be able to narrow down exactly what is going on. IMO the compressed air/moisture may be the culprit causing the refrigerant to "stack" in the accumulator but without some actual pressures it is all just theory. [/QUOTE]

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