I have No hot water, pressure when I turn on my shower , the cold water turns on no problem. I think it is the shower valve

This effect is most common when the water supply port gets plugged, and they are quite small. Turn off the house water or water at the mixing valve, pull the cartridge and make sure the small supply ports are clear. Also "bump" the water on to clean out any debris in the valve body. Reassemble and you should be good to go.

Hello Vicorramirez,

If you would tell us the brand and the model number of your Shower valve, will help Ma0641 (Brian) and us to give you more instruction, Thanks.

John