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Heater-Defrost

Part Number: AP4133093
MFG Part Number: D7718301
Made by: Whirlpool

Genuine Whirlpool part. Whirlpool brands include Whirlpool, Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and others.
Whirlpool also makes various appliance models for Sears / Kenmore.

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Cross Reference Information

Part Number D7718301 (AP4133093) replaces 139477, AH2120698, EA2120698, PS2120698.

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Repair Video

How to Replace Heater-Defrost #D7718301

Step by step instructions on how to replace a Heater-Defrost #D7718301. Note: This video is intended to give you the general idea of the part replacement procedure. Your appliance may differ depending on the manufacturer and model.


 

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Our model number is BR20QBW. And we do have the ice buildup throughout the whole back coil area. We defrosted the unit and replaced the thermostat. It lasted about 3 weeks and now we have the same problem/symptoms. Warm fridge.

Steve

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We have a bottom freezer Amana and the symptoms are warming in the top of the refrigerator. When we pull the panel from the back of the freezer, there is ice buildup. So, we changed out the thermostat and still have the problem. Thinking the next step is to change the heater unit? How can you tell, diagnose, whether the thermostat or heater unit? Any other suggestions you would have would be great and appreciated! Thanks.

Steve

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Once you take out the heater, how do you test it to make sure its bad? Have already checked and tested the thermostat and it is working properly. My issue is the freezer was frosting up solid and the refrigerator section was warming up. Whats does this sound like to you?

John A. for Model Number BZ22QL

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