I have a Monitor 1300/1400 series Delta shower.

I replaced the cartridge today, and it's just not getting hot enough. It's not nearly as hot as the tub a few feet away. I've adjusted the temperature limiter all the way to the hot side, and I've even removed it completely. With the handle turned all the way to the left, even with no limiter, the shower is not very hot.

Any ideas?

Thank you!