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BarbaraB  
#1 Posted : Thursday, January 14, 2010 3:29:22 PM(UTC)
BarbaraB

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Joined: 1/14/2010(UTC)
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Defroster not working. Lots of ice on freezer coils. Defrosted myself via hair dryer. Appliance repairman tested and ruled out defrost heater kit (#230) and thermostat (#240), which were apparently still functional. Feels Sensor Temp (#241) is unlikely culprit, altho did not test. Recommended replacing Main Control Board (#801). Your thoughts? Is there anything else we may have missed before I order the expensive Control Board?
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Migeguy  
#2 Posted : Sunday, January 17, 2010 2:52:53 PM(UTC)
Migeguy

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Joined: 1/17/2010(UTC)
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Originally Posted by: BarbaraB Go to Quoted Post
Defroster not working. Lots of ice on freezer coils. Defrosted myself via hair dryer. Appliance repairman tested and ruled out defrost heater kit (#230) and thermostat (#240), which were apparently still functional. Feels Sensor Temp (#241) is unlikely culprit, altho did not test. Recommended replacing Main Control Board (#801). Your thoughts? Is there anything else we may have missed before I order the expensive Control Board?



It maybe either your evap-thermister or frz-thermister. The control board has to know that the freezer is below zero temp before it will engage the defrost cycle.
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Freezer Coils not defrosting and Ice in bottom of freezer (Refrigerator & Freezer Repair)
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