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darned.Just as I have always suspected,the micron reading at the vac pump is not the same as the micron reading at the evap coil.We hooked up 2 of the same micron gauges, 1 at the vac pump & 1 at the TXV external equializer connection.Line size is 3/8 & 3/4" ,30' long.After 15-20min of startup of vac pump,there was 750 microns at the pump and 6500 @ the evap coil.After another 10-15 min the readings were 175-200 pump & 850-900 @ the evap.We broke the vac w/ nitroge ,reversed the micron gauges and restarted the vac.4-5 min we had 125 @ the pump & 350 @ the evap coil.Conclusion, well I'll be darned!