Thank you! The plastic piece that goes into the handle to turn the valve on broke. Do you know if I have replace the whole valve or just replace the valve stem?
The cartridge should be all you need.
Unfortunately, complete idiots did the work there and you do not have access to the screws that (after the water is turned off) allow you to get at the valve body to do the swap out.
Hmm okay, thanks! Shouldn’t be too hard for me to cut around it and make some room. After I have access, I just need to turn the water off and I can do that swap out?