When you turn to hot it doesn't come out. Cold does.

Assuming that you have hot water at other faucets the problem could be a varnish buildup in the cartridge. After shutting off the hot and cold water either by turning off the main or at the faucet stops (if equipped), remove the cartridge and soak it in white vinegar to break up the varnish. You can clean it up with an old toothbrush and make sure that it is working. It should rattle when you shake it. new cartridges are not very expensive so you can just buy a replacement at any home center as well. If you are the original owner of the faucet Moen will send you a free replacement cartridge if you call them.

I have the same problem with a Moentrol (pull and turn left or right) shower valve. Our high-end Moentrol (a new name for the stand 122B cartdridge) is a year old. Had a plastic cartdridge. Replaced it with an OEM brass Moen 1225B cartdridge, and still have the same problem. I have a little more flow, but as debbenu explained, When I turn the lever handle to fuller on Hot, I get nothing, but a small (jump around to get wet, hit your head on the shower head) trickle.