20 Most Recent Moen 24 In. Towel Bar... - Page 8 Questions & Answers

sounds like either the cold water that feeds the other half got shut off, or the mixer in the valve for controlling the water temperature is broken....most likely the water got shut off. better go to the water source and trace the cold water feed pipe ,looking for a shut off valve....it could also be behind the shower panel, then turn or rotate the valve the other way and go test the water to see if you can adjust the temperature now.....if not, then replace your hardware.......in the mean time, you could turn the temperature down on the water heater so that you won't scald yourself in the shower til you have time to fix it properly.

here is the installation manualhttp://www.moen.com/shared/docs/instruction-sheets/ins855.pdf pay attention to step number 7 do in reverse to remove handle

If you turn it to left or right (hot or cold) and get water out of the shower head,we'll elimate cloged shower head.If it just doesnt work in the middle ,probily a washer is stuck in your diverter,or to better understand>a part inside your shower knob assembly is clogging the water that goes up to your shower head. If you get water out of the shower head in the just cold possition or just hot position,then you will have to dissasemble the unit to repair. If you get no water in the cold or hot position could just be a clogged shower head.If you dont know how to disasemble a Shower diverter ,I wouldn't recommend taking it apart. Hope this helped!

If you have hot water elswhere in the bathroom but not the shower head then the diverter valve in the handle for the tub is most likely bad and needs replaced. The diverter is also called an anti scauld valve, it mixes the hot and cold water to prevent scaulding you in the shower

Try this......
manualsonline.com/manuals/mfg/moen/9999

You need to purchase a moen puller it can be purchased from most supply houses such as Home Depot or Lowes and as you tighten it up it pulls out the cartridge.