A:Answer This is a great question! Yes, this is normal. Your dishwasher is equipped with a hidden vent; found on all models without a visible vent on the front (primarily top-control models), the vent is concealed inside the dishwasher door. This provides a clean appearance, seals in sound during the wash cycle, and protects against venting damage to countertops such as Corian or granite. We hope this helps! -Chris@GEA