Hello... We are do not know what to do. Had a new well pump installed. It clogged up right away from all the dirt. Needless to say, everything in the house has to be unclogged. We have everything working except the cold faucet in the shower. The hot side works but cold water will not come out. We banged on all the pipes up to that point, we took the knob apart to see if it needed cleaned, and nothing happened. We do not know what else to try... help!! Thanks so much... dell