Single handle shoer/tub faucet no hot water
I have a single handle pressure balance tub & shower faucet in my tub/ shower. It has been working fine since new for 3 years. Today, I go to take a shower and I have no hot water. Let me explain. When I rotate the single handle, the cold water runs out, but when i continue to rotate the handle to the hot water section, the water stops flowing. The sink in the bathroom works fine --- hot and cold water... no problem.
Any ideas as to what this problem may be and how i can fix it?