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in class about the blended freons causing problems w/ O sings, Schrader inserts, and some of the other stuff inside refrigerant control devices. So, I replaced a refrigeration cond unit/TXV and added R-422b , the next day I replaced a leaking LL solenoid valve. Then I put the same Freon into a 20 year old res system ,new Schrader inserts, and the next day the suction service valve is leaking .
Does anyone else see the same results w/ other r22 replacements?