Originally Posted by
Milo Dolezal
Water leak inside the wall is unrelated. There may be several things that may have gone bad. I would suggest that you first: Uninstall shower are, apply new teflon tape on threads and reinstall. Also, spout may be leaking. See if there is a gap between spout and wall and whether you can see water running in that gap when spout is active. If all appears to be OK, than remove faucet trim, take flash light and look inside the wall. Turn water ON. See if you can see dripping water. If negative, then go the the closet and cut port hole in the wall so you get better view.
Let us know what you've found out...