Ice buildup on the freezer floor or under the bottom basket.

Safety first: Unplug the refrigerator and prepare towels for water cleanup.

Steps:

• Remove ice: Chip away loose ice on the freezer floor with a plastic scraper. Do not use metal tools.
• Clear drain: Access the drain hole under the evaporator and flush with warm water until it flows freely to the drain pan.
• Check outlet: From the back, inspect the end of the drain tube above the drain pan. Clear any ice or debris.
• Optional: Install or verify a drain heater (if equipped) to prevent refreezing.