Ron shimek, president of mr. Appliance, a neighborlycompany begins, 'while a refrigerator can leak inside for several reasons, one of the most common is a blocked defrost drain. ' the defrost drain is the small drain tube at the bottom of you… water dispensers are wonderful refrigerator accessories, but they are prone to breaking down over time leading to small leaks. To check a water dispenser line for damage, turn off the fridge and turn the shut-off valve to stop water from moving to your applian…