No hot water coming from shower/tub combo
I haven't used this shower/tub combo in awhile. I tried to fill up the tub with hot water and no hot water comes out. It makes a knocking noise. I do have hot water at the sink. I called my plumber and he said to remove the handle and knock on the pipe. Problem is I can't get the handle off. It is single lever and two screws behind lever. I pulled off the little cap on end of handle but screw inside won't turn. Is there something I am missing. I can't get to the screws without removing the handle. Help