This cartridge is being discontinued. Please see P4030-7 before you order this part. It is to your advantage.
This cartridge is auto-off except under conditions of low, extremely high or unreliable water pressure, sediment or particles in water, buildup of lime, salt, iron or other mineral deposits, etc., in which case it must be disengaged manually by the user .
Before You Replace It - Be Certain You Are Operating It Correctly
Make certain it hasn't accumulated buildup, sediment or particles
Make certain there is a clearance gap between the diverter knob and the faucet body.