If you find that your shower handle needs repair, you don't necessarily have to buy a new one. Older shower handles will be hard to find anyway. Repairs can be made to most shower handles quite easily. Generally, shower handles are made of metal or plastic. You probably either have a loose, cracked or broken shower handle.
Loose Shower Handle
Inspect your shower handle to see where the screw is that removes the handle. Two locations are very common. One is beneath the handle. In this case, you will see a small hole with an Allen key screw in it. Or you may have to pry off a cover, located in the front of the handle. Then you can access the handle screw.
Check to see if the screw simply needs tightening. If it is tight but the handle is still loose, then the screw threads may be stripped out. Try wrapping a bit of thread-seal tape tape around the damaged threads a few turns. This will often make the screw tight again.
Reinstall the screw and tighten it down. Install the cover after cleaning it with a rag and some degreaser.
Cracked or Broken Shower Handle
Remove the screw that holds you handle in place, just as described in Section 1. Remove the handle and see if it is cracked or broken. Broken handles can be repaired as long as you aren't missing any pieces. If you are missing a piece or two, you will have to buy a new handle.
Cracked handles can be glued back together.
Buy a two-part epoxy or specialized repair product for your plastic or metal handle. Mix the hardener and catalyst together in equal parts using the kit's enclosed container and mixing stick.
Apply the epoxy mix to your handle. Use rubber bands to keep the two halves together. Let dry according to the manufacturer's directions. Reattach the handle, set screw and any cover.