Originally Posted By: jimhogan
Aside from achieving a capacity bump, one reason we replaced the systems was agae (18 years) and that it did seem to have a slow leak in a coil. So maybe the 4th visit simply finally purged some water out of the system. Anyhow, if Bitt's system is old, I guess my take home is that simply recharging might not fix a malfunctioning loop.

A coil leak can be fixed by brazing. I had a leak in my coil where coil vibrated enough to wear a few small holes into it (the coil would hold refrigerant for about five days, so it was prety slow). After fixing the vibration problem the holes were brazed. So far that fix has held for 5 or 6 years.