We built our house 6 years ago and our shower faucet is Moen. When we turn the faucet on in our children's bathtub, we only get hot water. I've checked and both hot and cold water are plumbed to the faucet. It has one handle that, when off, points to 6:00. As you turn the faucet from what should be cold to hot, you just get hot water to very hot water. I've taken the faucet apart, and taken the two little white plastic disks with serrated edges off the stem. I can't find what I need to turn to make an adjustment to the temperature.