Rodger H Waupun , WI October 03, 2016 Appliance: Kenmore Refrigerator 79578403804 Kenmore Refrigerator 79578403804: Error dh on kenmore refrigerator. How to replace Defrost Sensor Assembly. Removed freezer door,shelves, and guides on sides of freezer. Removed back panel of freezer for access to defrost thermostat replaced with new part crossed my fingers and hoped I had the problem fixed. Three days have passed and no error code. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours