Hi, Bobby 41!
Thank you for your question. There is a rotational limit stop (RLS) at the temperature control to adjust the hot water limit. To adjust the RLS, first remove the temperature cover and take a phillips head screw driver and turn the set screw counter clockwise to remove. Remove the gray knob. Behind the knob, you should see a black disk. Take the disk and take it out and place the disk to the hotter side. The hot side should be up against the iron piece that is sticking down on the volume handle. Once adjusted, reinstall all handle parts.
Date published: 2019-01-10