Have hot water at sink, it a single handle in the shower need help thanks

have hot water at sink, it a single handle in the shower need help thanks

Shut the water off to the shower valve and open it up. Remove the cartridge and check and clean the inlet ports. Before you button up turn the hot water on to flush out the supply and open valve body. There should be a strong stream of hot water. If not tell me about it. Good luck, Tom