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I by passed the heating element and tested that it works . I replaced all temp sensors also. How can I tell if this element is in fact turning on on its own when needed . Is there a way to test the temp control relay in mother board to see if it's working and turning on by itself when needed?
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From what I can remember after replacing all temp sensors I replaced the circuit board and it corrected issue.
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Please tell us what your symptoms are. I'm not sure I understand your problem.
Cause 1
Defrost Control Board
The defrost control board determines how often to run the defrost cycle. If the board fails, the refrigerator will not go into the defrost cycle. Before replacing the defrost control board, first test the defrost heater and defrost thermostat. If the defrost heater and defrost thermostat are working properly, the defrost control board is likely defective.
Cause 2
Defrost Timer
The defrost timer turns on the defrost heater several times throughout the day to melt any frost that may have accumulated on the evaporator coils. If the defrost timer is defective, it may not advance into the defrost cycle, or it may not send power to the defrost heater during the defrost cycle. To determine if the defrost timer is defective, slowly advance the dial into the defrost cycle. The compressor should turn off and the heater should turn on. If the timer does not send power to the defrost components or advance out of the defrost cycle within 30 minutes, this indicates that the defrost timer is not advancing. If the defrost timer is not advancing, replace it.
Cause 3
Defrost Heater Assembly
The defrost heater assembly turns on several times throughout the day to melt away any frost that may have accumulated on the evaporator coils. If the defrost heater assembly is defective, the defrost system will not work, and frost will continue to accumulate on the evaporator coils. To determine if the defrost heater is defective, use a multimeter to test it for continuity. If the defrost heater does not have continuity, replace it.
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Frig is not defrosting evaporator icing up. I replaced all 3 thermistors , the temp thermostat sensor and heater element. I tested the element by bypassing the switch on circuit board and element heat up. Now I'm just trying to determine if the heating element starts on his own . This model the temp control is built into circuit board . Is there a way to test to make sure built in temp control is working and turning on the heat element when needed. I know it then element suppose to come on a few times a day , but how do I know this is happening .
2 minutes ago by carlito121 Edit Delete
Hi, is it okay to check continuity of defrost heater as it is installed in the evaporator or take out and check it?
Kamal you can use your multimeter but check it on a higher 110V setting and see if current is running through it, otherwise if it comes on it will burn out your meter
Connect a low load test lamp parallel to the heating element and route wiring out of fridge compartment so that when heater turns on the lamp lights up outside fridge. In this way you can note how long defrost cycle runs. can use decoration led lights used in parties instead of lamp. If you want to verify if control board is initiating defrost cycle or not, connect test lamp at board end.
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Hi Carlito, Did you ever find the issue? I’m having the same problem where the fridge will not automatically defrost but I can get the control board to enable the defrost by manually entering into the troubleshooting cycles.
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Frig is not defrosting evaporator icing up. I replaced all 3 thermistors , the temp thermostat sensor and heater element. I tested the element by bypassing the switch on circuit board and element heat up. Now I'm just trying to determine if the heating element starts on his own . This model the temp control is built into circuit board . Is there a way to test to make sure built in temp control is working and turning on the heat element when needed. I know it then element suppose to come on a few times a day , but how do I know this is happening .
из carlito121