Hello,
welcome to Fixya.
The issue is likely just the blower and housing drain hose blocked with "dirt" from time & use.
First things first...**turn off the power via the breaker at your home service panel...safety first**
Yes, you will need to take the door panel off ( watch those edges they are VERY sharp ) and unfasten the control panel as well, the screw`s are around the perimeter of the door facing the dishwasher tub opening.
Once you have the panel off, you will then unscrew the round part surrounding the vent fan inside the door ( it turns about 1/4 turn counter-clockwise ) the fan motor assembly can be pulled off the door and cleaned out.
You should now remove the small rubber drain line from the fan to the tub which is routed inside the door panel & clean it out as it too gets plugged hence, not allowing the condensation to run back into the tub to be pumped out so when you open the door it pours onto your floor.
Hope you find that helpful. Let me know how you make out or if you require further assistance.
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Good luck.
Macmarkus :)
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Very thorough answer!
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