I just moved in with my aunt and uncle to help out after my uncles surgery. I went to hop in the shower, the water was freezing! I let it run for about 10 minutes, really didn't get any better. I ended up having to take a cold shower, not fun during the winter. I've visited them before during the summer, so maybe I never noticed it before since I'd leave the temperature down a little when it's hot out. They said it's always like this, they don't know why or how to fix it, and just to deal. Well, I'm not a fan of freezing my butt off just to be clean. The shower is a couple years old, they had it put in after owning the hours for about 8 years. The shower head is a Delta 1400 series. It has two screws to take off the circular metal piece, and it's a lever. I've read a whole bunch of other questions and answers, and just want to know what would be right for this specific model so that I don't screw anything up. Thanks.