Moen Posi-Temp,No water pressure on hot side in shower

Moen makes a tool to remove cartrages not cheap.Two different kinds P/B
and non P/B.You need P/B remover.

I yanked the cartridge out with pliers and it didn't rattle like a spraypaint can when I shook it. It looked like one of the rings was missing and the side rubber piece was broken and may have been blocking the flow. I got a new cartridge and its fine. Thanks for your help

Glad to be of help.

It's a Moen Posi Temp 3570 with built in stops, you know to replace the cartridge. Call us today @ 1-800-289-6636 and ask for a 1222B Cartridge.