Initially freezer was 25 degrees, refrigerator 55 degrees.After reading forums I replace control board,defrost thermostat and defrost heater element.It gor better after 24 hours freezer temp lowest was 9 degrees,refrigerator 38degrees.After placing back items in freezer/refrigerator half of capacity/items ,temp was freezer 14 refrigerator 45 degrees.I think the system is running the whole time,whenever I open freezer I hear fan blowing in the freezer all the time and placin my hand on the side I could feel it always running.Initially when repplace defrost thermostat and defrost heater,notice bottom half of coil was frozen,did let ice melt before putting back the cover/turning on the system.When I replace board something about j wire cutting off but only for bottom freezers.Any advice? one thing I haven't replace is thermistor.