so you are saying that there is either no hot or no cold water going into the valve.
Or how do I check it? turn the water off, take the valve off, then turn it on slowly to see if something is coming out both sides?
Sorry , Had to leave. I went back the next day and took all the guts out of the valve and it would still not work. So I decided the problem was in the pipes leading down and/or up. could not get any type of snake to go through completely so decided to force water back up the pipe from the tub side and was able to force it out through the shower spout. It opened it up some but not the same amount of pressure that comes into the valve. it is slow and imposible to shower with. So I concluded that there is something stuck in the pipes at or in the valve housing and dont know how to get it out without replacing the whole thing. any suggestions.
Agreed, I could probably buy a 1/2in thread to hose adapter and try that to see if it flushes the obstruction. thanks for your help.