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wjroberts  
#1 Posted : Monday, June 20, 2011 6:20:33 PM(UTC)
wjroberts

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Joined: 6/20/2011(UTC)
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I am trying to determine if the evaporator coil defrost cycle is controlled by the motherboard or if there is a separate defrost timer? I have checked the heater, defrost thermostat and evap fan. All are working OK.
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richappy  
#2 Posted : Tuesday, June 21, 2011 1:45:42 AM(UTC)
richappy

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For defrost failure, you may need a new motherboard AP4436216
Unplug fridg, remove the motherboard cover and remove the 3 pin power connector. Place a wire jumper across the mating connector pins that are labeled line and def. on the motherboard. Plug in fridg. if you get defrost action, you have a bad motherboard, assuming the freezer temperature was below 20 degrees.
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