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Excessive frost or ice accumulates on the evaporator coils and freezer back wall because the timer never triggers the defrost heater to melt it away.
The fridge section warms up as a solid block of ice on the evaporator restricts all airflow from the freezer into the fresh-food compartment.
When the timer sticks in defrost mode, the heater runs continuously and raises freezer temperature, causing frozen food to thaw unexpectedly.
The internal timer motor fails and the dial stops rotating, locking the refrigerator in either the cooling or defrost position indefinitely.
A partially failed timer advances inconsistently, causing the refrigerator to cycle between too-cold and too-warm temperatures in an unpredictable pattern.
💡 Pro Tip: How to Tell If Your Defrost Timer Has Failed
Your part is likely the culprit if you notice any of the following:
⚠️ Freezer compartment has heavy ice or frost buildup on the back wall or evaporator coils
⚠️ Refrigerator section feels warm even though the compressor is running
⚠️ Food in the freezer is thawing or temperatures are inconsistent
⚠️ Timer dial does not advance on its own over a 6–8 hour cycle
🛠️ Quick bench test: Use a flat-head screwdriver to slowly turn the manual-advance dial clockwise. If advancing the dial into defrost mode causes the defrost heater to come on, but the timer never automatically advances back to cooling mode on its own, the timer motor is dead and replacement is confirmed. Always unplug the refrigerator before removing the old timer.
📦 What's in the Box
✅ 1× Defrost Timer 215846602 (120V / 60Hz, 30-min cycle, 4-terminal plug-in)
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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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