Replaced a moen cartidge and now the water is not hot in shower
I pulled the old moen cartridge from the shower because I had a water leak. The new cartridge fixed that problem but now the water will not get hot enough for a shower and the water preasure is down. I checked the water stop to make sure it goes all the way to Hot and it does.
Re: replaced a moen cartidge and now the water is not hot...
Make sure when you turn on the hot and cold shut off valves all the way and turn the moen on after that. Some times I would get that problem if I turned one(either hot or cold) off then tried the shower.
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You will need to remove the old cartridge from inside the shower valve body and either refurbish it with new rubber seals and O rings or replace the cartridge altogether (preferable). It's not a complicated fix but the Posi Temp cartridge can be a bear to remove. Moen and Danco make special 'pullers' to make the cartridge removal go a little easier (sold at Lowes/HD and plumbing supply for anywhere between $15 and $35 but well worth it, IMO).
Once you have removed the U shaped cotter pin whis is brass in colour. Use a pair of plyers and hold on to the brass stem. you will need to pull fairly hard to remove. If you have the white or black stem loosening knob which comes with the replacement cartridge you can insert that into the brass cartridge where the plastic sides of the cartridge are showing. Turn your plastic konb clockwise to loosen the cartridge and then pull out.
This sounds like a bad cartridge. They can be replaced. To replace the cartridge:
Turn off the water to the tub/shower.
Remove the handle cover (it should pop off)
Remove the center screw (usually phillips head)
Remove the retaining clip holding cartridge in - you can use a pair of long nose piers or a small screwdriver
Grab the cartridge with a pair of pliers and pull straight out. It may require a little force - there are O-rings around the cartridge to keep it from leaking.
Check the cartridge bore (the hole where the cartridge was removed)
Clean any debris or scale - lime away or CLR will work
Apply a little bit of soap around the new cartridge to help it slide in easier. Push it all the way in and make sure it is seated. Re-install the clip (you should have received a new clip with the replacement cartridge)
Turn the water back on a check for leaks
If OK, reinstall the knob screw, and cap.
Maybe it is not seated correctly. But I would take it back and make sure you ask for a moen cartidge, because there are two or three off brand cartidges that are made to fit moen but they are cheaper in quality.
hi... yes that's a very common issue with moen "cartridges" -- it's very simple to fix..... grasp the handle and give it a gentle tug upwards when the water is on... if it retracts again, pull the handle out again and tug again but this time a bit harder. Not sure what causes this on new cartridges but it will fix your issue.