Will I die if I remove this top cover?

I know not really hvac, but trying to diagnose the pressure switch/fan motor/blower temperature sensor issue on my power vent gas water heater and would really like to remove this top cover to see if there’s any blockage from the air tube into the pressure switch. It’s completely disconnected from power, but I’m not a professional and want to be certain given the warning.

I know not really hvac, but trying to diagnose the pressure switch/fan motor/blower temperature sensor issue on my power vent gas water heater and would really like to remove this top cover to see if there’s any blockage from the air tube into the pressure switch. It’s completely disconnected from power, but I’m not a professional and want to be certain given the warning.