Incomplete Trane Split HP 2 zone system. HO said wasn’t cooling started Friday and HP was short cycling. Had another company come yesterday and they are planning to do a leak search tomorrow. He wanted a second opinion. I found system short cycling. But it PRessures were 50 & 300. Checked upstairs and found no adjustable txv stuck closed. Added about 6oz of 410 with no change. Need new txv.