Question about GE Refrigerators
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 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.
With an ohm meter it should show continuity when cold and none when warm.
you have an adaptive defrost control instead of a timer, replace it if the heater and thermostat test good. It is located on the back. It's part 801 in this diagram and parts list.
Based on the other diagrams you have a fan in the freezer (evaporator fan) and one underneath near the compressor. Condenser fan. here is a link to your diagrams. The sealed system and motherboard is where the control is.
Posted on Jul 11, 2010
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Posted on Jan 02, 2017
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