Question about Refrigerators
It sounds like your defrost element or the control is bad. To check the defrost coil you will need to unplug the frig and unload the freezer. If you have enough ice chests everything should be good for several hours. Remove the cover from the evaporator coil in the freezer. Usually below the coil is the defrost coil. It is a small heating element which turns on periodically by the thermostat to remove any moisture from the coil. It does this when the unit is not calling for cooling.
Remove at least one wire from the coil and check it with a DVM set to ohms. It should read low resistance but not no resistance and certainly not high resistance. If it checks bad you will need to install a new one.
If it checks good you will need to order a new thermostat control. This may be on the refrigerator side. All parts can be ordered from http://www.repairclinic.com which also has very good people to help you determine the exact part you need as well as good how to videos.
This should get your unit working properly.
Thanks for using FixYa and for the great rating!!
Posted on Aug 24, 2010
You have a problem with the defrost circuit of your refrigerator. The defrost circuit is periodically activated to defrost the evaporator coils. This circuit consists of the controller board, the defrost heater and defrost thermostat. The controller board is located in the back of the refrig just above the compressor behind an access panel on the right side. The defrost heater and thermostat is mounted on the coil. The heater and thermostat are connected in series so, if either component fails, the heater does not turn on. Most likely the problem is caused because of a break in the heater connection.
This can be checked with the freezer still cold and using an ohmmeter. To do this, unplug the refrigerator, and pull the access panel from the back of the machine. Behind the panel will be the control board. On the lower left side of the board should be a blue wire connected to the J9 connector. Remove the J9 connector and connect the blue wire and the orange wire on the J7 connector to the ohm meter (J7 is located on the bottom of the board). The meter should read around 30 ohms. If it reads infinity, then the heater/thermostat is opened.
To get to the heater/thermostat, you will need to empty the freezer and remove the entire back panel to access the coil. The heater will be mounted on the bottom of the coil. The heater is attached to the defrost thermostat through a wire and the thermostat is mounted on the top of the coil. Check for any visible breaks in the wiring. Most likely is that the heater is burned out. The heater and thermostat can be bought at any appliance supply house or online at repairclinic.com.
Let me know if something is not clear or if you need more help by leaving a comment. Thanks.
Posted on Aug 24, 2010
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Posted on Jan 02, 2017
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