Repaired a small leak today in an RTU using proper service practices: recover, repair, filter/drier, micron vacuum, weigh-in. But all the while I was wondering, could I have repaired this with freon in the system (saving a few hours): 1) the leak was tiny and very accessible, 2) system static pressure was only about 90 psi.
I assume the problems with this procedure would have been: 1) excessive heating of refrigerant, 2) safety, 3) may not work at all, as well as other problems of which I welcome you to remind me.
But just wondering . . . has anyone ever successfully repaired a leak without recovering? Maybe by recovering down to 15 lbs or so?