Ice buildup on freezer floor or under lower basket.

Safety first: Unplug the refrigerator. Ice can be slippery; use caution.

Steps to check:

• Remove ice: Take out the lower freezer basket and chip away loose ice carefully with a plastic tool.
• Clear drain: Locate the drain hole at the rear bottom of the freezer and flush with warm water until clear.
• Check drain heater: If equipped, test the drain heater for continuity and replace if open.