Delta t needs to be 16 at a minimum. The lower the supply vs return the better your cooling efficiency. Txv would be my first guess if nothing has changed other than not keeping up. They probably didn’t use nitrogen when they soldered the joints and that soot has been trapped in n the txv causing it to stick. Bet the super heat and sub cooling are way off but “ pressures aren’t bad”

Last edited by YellaLineHunter; 08/14/26 10:16 PM.