To this day there are NO warnings of an incorrectly configured bleed/press panel on the 737.
Maybe no aural warning like configuration or other bells and whistles. But there are two qualified Being 737 pilots on the flight deck. Plus two gauges that show cabin rate of climb and cabin differential and cabin altitude. Plus a checklist read as challenge and response. Plus airmanship. How many other warnings do you want if the problem cannot be seen by a competent crew. The operative word being "Competent".