colleagues I have a question maybe you can help me Yesterday I saw a refri with a clogged capillary. Right now I don't have nitrogen so I installed a service valve in the low pipe and released the capillary from the filter and used coolant, turning it upside down so that more liquid comes out than gas in theory has more pressure. if you open it stopped and get some black oil out of the capillary outlet and felt an airy but very weak, well I thought the obstruction was already released Then I welded all the tubes and emptied and charged gas but the fridge didn't cool I measured pressure and it was fine at first then with a finger I pressed the worm of the valve and it did not come out almost as if there was no gas then I thought that it became clogged again and warmed the filter and released the capillary and in the filter came out a repichazo of refrigerant gas like everything accumulated there My question is, is that just by cleaning the part of the capillary - evaporator and not the part that is high in the condenser? then there was no way to unclog the capillary or with an industrial air compressor that I borrowed from the client