To take apart a bath/shower faucet for repair, first turn off the water. Then take the faucet apart by removing its handle, escutcheon and packing nut. The packing nut may be buried deeply in the wall, requiring a socket wrench for removal.
Your bath and shower faucets may have a renewable seat that can be smoothed with a seat-dressing tool or removed and replaced using a seat wrench. For replacing and repacking the washer, follow the same instructions provided for a washer-type faucet. Some faucets may need a complete replacement of the combination stem/seat unit.
It depends on what type of fixture you have. If you have a cartridge type, the cartridge needs to be replaced. If you have something like an older Crane model, there is a knurled, round nut between the handle and escutcheon that will sometimes work it's way loose and keep you from turning the water off. Just turn it back in until finger tight.
sometimes there are orings or gaskets that get tore in assembly one of those may be bad,or if it is around the threds you might try wraping teflon tape around the thred once or twice.hope this helps
Remove hot/cold button in handle, remove screw/pull off handle. Remove the two screws in the wall plate/remove plate. Use a wrench to remove the diverter assembly. Get new diverter assy and reinstall eveything. You don't need to turn off the water.
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