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prestcold compressor model number PR750/0138-12 BS Liquid line is cold ?

in this compressor i use R22 gas; that's why i change expantion valve but after solnoid valve liquid line come cold &suction line come ice
vasim, April 2011
Obviously, you are not qualified to use refrigerants. It is a criminal offence to use them without proper qualifications.

SD, April 2011