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Refrigerator never enters the defrost cycle, causing ice to accumulate on the evaporator coils and blocking airflow to the fresh food compartment.
Thick frost or ice buildup on the interior freezer walls and evaporator, reducing usable space and cooling capacity.
Fresh food compartment warms up because frozen evaporator coils block cold air circulation — defrost board has failed to initiate a heating cycle.
LED lights in both fresh food and freezer compartments flash or flicker rapidly when the door opens, indicating a defective control module.
Unit shuts down and fails to restart after a defrost cycle due to a sticking relay or failed board logic on the defrost control board.
💡 Pro Tip: How to Diagnose a Failed Defrost Control Board
Your part is likely the culprit if you notice any of the following:
⚠️ Heavy frost or ice buildup on freezer interior walls and evaporator coils
⚠️ Refrigerator side warming up while freezer remains cold
⚠️ Refrigerator does not enter defrost cycle automatically
⚠️ LED interior lights flashing or flickering when door is opened
🔍 Before replacing the board, always test the defrost heater and defrost thermostat first with a multimeter. If both test good, the adaptive defrost control board is the likely defective component. Avoid touching the center of the board — it is sensitive to electrostatic discharge (ESD).
📦 What's in the Box
✅ 1× Adaptive Defrost Control Board (3.4" L × 5.8" H × 2.3" W, 4-terminal connector)
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Disclaimer: Compatibility information, part numbers, and model fitment data on this page are sourced from manufacturer databases and third-party references. While we strive for accuracy, please verify your appliance model number before ordering. Heima is not responsible for errors or omissions in compatibility listings.
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