Hi,I have a Bathtub Shower Valve that is not working

You'll probably have to replace the bathtub spout. Here is a cut away view of a typical bathtub spout with the water redirect.


http://cdn1.tmbi.com/TFH/Step-By-Step/FH06FEB_BATHSP_03.jpg

It's possible you installed the valve upside down, all values should be labeled in some way marking either hot and cold or it will say the word up where the riser tube port for the shower head is. If that's not the case remove the tub spout and check for any obstruction sometimes during tile or constructing debris can get into the pipe for your tub spout. Lastly the diverter on the tub spout could be bad. Try a new tub spout

You can remove the center (Diverter valve) without turning water off, Will need deep well socket. Check the o rings and or washers and replace or take valve to Home depot to match with new. If you can't find one there go to local plumbing supply or ace. I turn hot then cold on and off real Quick while the valve is out just to clear anything that might be in lines. stand to the side or you will get wet! You might want to get new hot and cold valves while your at it just make sure to turn off water at meter before you remove them.

One rule I live by: more parts, more problems. Sounds to me that the plumbing/valves were not insalled properly. If you hired a profesional plumber, have them fix it. I am a licensed profesional plumber and I offer a 1 year warranty on all my work. If the contractor did the work and does not hold a plumbing license, that person is still responsible and may have to suffer legal consequenses.

If you turn it to left or right (hot or cold) and get water out of the shower head,we'll elimate cloged shower head.If it just doesnt work in the middle ,probily a washer is stuck in your diverter,or to better understand>a part inside your shower knob assembly is clogging the water that goes up to your shower head. If you get water out of the shower head in the just cold possition or just hot position,then you will have to dissasemble the unit to repair. If you get no water in the cold or hot position could just be a clogged shower head.If you dont know how to disasemble a Shower diverter ,I wouldn't recommend taking it apart. Hope this helped!

Check beneath the bathroom sink there must be a valve to close the water from going into the bathtub. Or check for a little door near the bathtub find that valve and close it. You have to buy a new handle cause that one is ruined. If you don't find the valve, remove a plastic cover that it's in the middle of the handle, there must be a philip screw in there, take it out, remove the handle and then with shearing pliers turn counter clockwise and it will close.

Take the shower head off (and the valve) then turn the shower on and see if water will come out of the shower neck without the head on head on it

You don't indicate what kind of valve(s) you have in your shower/bathtub.

It is sometimes the case, when you have separate hot and cold valves that use the traditional flat washer, the rubber/viton washer wears over time and actually becomes cut, such that a part of the washer protrudes from the valve face.

Hot water will cause the distorted washer to expand. Consequently, as more and hotter water flows through the valve, the washer expands to the point where it constricts the flow of hot water.

Replace the washer, at least on the hot water valve.

Sounds like diverter valve which is your shower handle valve is bad take it apart and check out and replace it if possible because that transfer water to shower head.

Because the tile was added after the valve was set to correct depth, you will have to get a extention kit. They are only available at a supply house. This will extend handle further away so the handle wont scratch any more.