We installed a new Moen shower head. New install on rebuilt plumbing. The
water was not coming out very hot. The man who installed it came back and
took it apart and made some adjustments. Now it is too hot to shower. The
HW heater puts out water at 123 to the tub in the same room. The shower in
an adjacent bathroom is fine.

How does one adjust the hot water mix on them? We're calling the supplier
in the morning, but thought I'd ask here first.

Steve