There are two common types of diverters. In the tub spout diverter, a small gate valve is attached to the base of a plunger shaft located in the spout. It is held in the up position for the shower ...

When our tub spout diverter clogs, I use WD-40 with its spray nozzle curved up the spout to the diverter valve. A couple of sprays gets things loosened up and working again.— Jackson Tutt Did ...