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Refrigerator defrost thermostat. The thermostat clips onto the evaporator. If the refrigerator does not defrost both the thermostat and heater can be tested to determine which part is at fault.
OEM Part - Manufacturer #WPW10225581
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Bi-metal defrost thermostat
OEM Part - Manufacturer #WP2306462
Temperature sensor defrost, bi-metal
OEM Part - Manufacturer #00422501
Bimetal defrost thermostat
OEM Part - Manufacturer #WP2321805
No longer available
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