Question about Refrigerators
Make sure the evaporator fan inside the freezer behind the rear cover is running. In some models it won't run unless the door is shut so hold the door switch in to check. It circulates the cold air in the freezer and into the fridge through a damper (vent). Make sure the air is blowing into the fridge through it. Your fridge temp control opens and shuts the vent to adjust the amount of cold air getting to the fridge.
The evaporator coil behind the cover on the back wall inside the freezer will ice up under normal conditions. Every 8 to 10 hours for around 20 minutes the defrost timer (or in most newer models the electronic adaptive defrost control) will turn the defrost heater on to melt the built up ice. There is a defrost thermostat which prevents the heater from overheating the freezer by breaking the heater circuit when the temp reaches close to 32 degrees F. The entire cooling system shuts off during the defrost cycle and starts back when the timer advances through the cycle.
If this ice is not melted it will continue to build up until the air can’t flow over the coil to circulate the cold air through the freezer and into the fridge. The temperature change in the fridge is usually noticed first followed by the freezer.
If the defrost thermostat is bad, it can prevent the heater from coming on OR it won’t turn the heater off when it gets too warm. It is clamped to the evaporator coil at the top to sense the temp. If it appears to be misshapen it is bad.
With an ohm meter it should show continuity when cold and none when warm.
You can also bypass(disconnect the two wires plugged into it and twist them together) the thermostat to see if the heater comes on then. If it does then you know the thermostat is bad and needs replaced.
The defrost heater is located on the evaporator. It is in a tube which is at the bottom and can also go up the sides of the evaporator. On some types you can see a burnt spot if it’s bad. With an ohm meter it should show continuity from end to end when disconnected from the wiring in the freezer. You can also test the wiring for voltage when it’s in the defrost mode.
If you have an adaptive defrost control instead of a timer, replace it if the heater and thermostat test good. Your motherboard is part 801 on this diagram and parts list. http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5130309&diagram_id=22283831#d22283831
Your should be able to run it at any temp you want to. GE is known to have problems with the water dispenser water freezing in the door and you have a water reservoir in the fridge behind the crisper for the chilled water. It can freeze but in a fridge working properly the would be no problem.
Posted on Apr 28, 2010
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Posted on Jan 02, 2017
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