Red Seal Appliance Service Technician Practice Exam

What is a common cause of ice buildup in refrigerators?

1. Defective door seals or frequent door opening

2. High humidity in the kitchen

3. Overloaded refrigerator compartments

4. Poor air circulation inside the refrigerator

The correct answer is: Defective door seals or frequent door opening

A common cause of ice buildup in refrigerators is related to defective door seals or frequent door opening. When the door seals are not functioning properly, warm, humid air can enter the refrigerator, leading to condensation that may freeze and contribute to ice formation. This is especially evident when the refrigerator door is opened frequently, as it allows ambient air to enter and increases the chances of moisture accumulation inside the unit. If the door seals are compromised, even minimal openings can exacerbate the problem, allowing additional moisture to infiltrate. Consequently, maintaining effective door seals and reducing the frequency of door openings are essential practices for preventing ice buildup.