I have a water heater with State Censible PRV 50 NOVT1 model and the power fan is running continuously even long time after the gas burner was turned off. Looks like a thermocuple problem? Please let me know?

I think you will find the operating control/relay stuck closed or the overheat thermal sensor defective.

State Censible PRV 50 NOCTO 32w

I have a leak originating where the relief valve connects to the main housing. Does this sound like a valve issue or likely to be a rupture in the heater bladder?

Kelly F.