I just replaced a Moen Posi temp shower cartridge. Followed directions exactly. Turned on water and dial won't move at all. Any suggestions?

SOURCE: I have a Moen Posi-temp single handle tear drop

i am assuming you have hot water in same bathroom and that its fed by the same pipe? if so ask yourself did i have anything done recently that may have affected the shower ?if not i would think you have some kind of a blockage in fitting. one way to try to clear it is shut off water to house open shower fitting to what used to be the hot side when working,leave shower open,go o lowest level of house open hot side in sink you may get lucky and vacumn(think ****)debri from shower good luck .

SOURCE: followed replacement procedure for moen posi temp ...

Often time a Moen cartridge becomes very fond of it home and doesn't want to leave. I once stood on top of a kitchen sink just to get my back into it to remove a cartridge. That is a rare example.

Once the retainer clip is removed there is nothing to keep the cartridge in place except water minerals, lubricant, and suction caused by the lubricant. Frequently it will take a rocking back and forth of the cartridge to fully free it from it's confines before a good tug. If you don't use the white plastic tool that comes with the new cartridge, you could pull the center stem out only and that's all bad. Before installing the new one see if you can have someone turn on the house water for an instant while you hold a cup or glass over the hole for the cartridge. This will flush out of the valve body any particulate that might affect your new cartridge. The cup will help keep you and your bathroom floor dry.

After inserting the replacement as far as you can, place the tool back onto it and tap on it to make sure it is in all the way. Then use the squared end to put a wrunch on to you can turn the cartridge internally and align it for the retainer clip.

SOURCE: leaking shower/tub faucet, looking for replacement

Call Moen directly. They will ship what you need to your door, for free.

SOURCE: I have extremely low pressure from my Moen

Hi Ken--
Positemp cartdiges should deliver years of maintenance free operation. Usually, clogs develope downstream from the cartridge. If the cartridge still works well, that is, if it still pulls and turns freely, and the rest of the house has decent water pressure, check your shower head. Remove the head and test the water pressure. If the water flows better without it, you may have a clogged shower head. Over time, rust and scale can build up inside the shower head and block what would otherwise be decent water pressure. If a visual inspection does not yield any visible blockage, you can consider cleaning the head by soaking it in a calcium removing solution such as CLR. This often helps, but my preference is to replace the shower head completely.
--Hope this helps.

SOURCE: Low hot water pressure on

I think you are on the right track. The first thing I would do is change the cartridge. While you have the valve apart examine the inlet ports as good as you can to see if there is any mineral buildup. You can use a short length of a small gauge mallable wire to run into water ports to se if you can break anything loose. Another thing you can do is to turn supply stop on slightly while you have the valve disassembled to wash any particles out. Hope this helps you and thanks.