Plumbing: I have a single knob on my bath tub that controls the hot and cold water.
We "had" our plumbing problem "fixed" by a pro. It still does not work. Our upstairs bathroom has both hot & cold water when a sink facucet is turned on. But, in the bathtub, only the cold water works. Had it "fixed" almost a year ago, just had company, and there is no hot water coming out of the "HOT" side of the spout. Both the hot & cold water comes from one knob. What do we do next... do not want to call the same plumber, as he has already charged us $100. Help!