REFRIGERATOR ICES UP; DOESN'T APPEAR TO DEFROST PROPERLY. TEMPERATURE GRADUALLY CLIMBS. CONTROL BOARD AND FAN HAS BEEN REPLACED BY TECHNICIAN. FREEZER SIDE IS OK. Model zfsb23d ss

There are a few possible reasons why your Whirlpool GS6NHAXVK refrigerator's freezer is not freezing, but just cooling. Here are a few troubleshooting steps you can try:

1. Check the temperature settings: Ensure that the temperature settings are set to the appropriate level. The recommended temperature for the freezer is between 0 and 5 degrees Fahrenheit (-18 to -15 degrees Celsius).
2. Check the freezer fan: The freezer fan is responsible for circulating cold air throughout the freezer. If it's not working, then the air won't circulate properly, and your freezer won't freeze. You can check if the fan is working by opening the freezer door and listening for the fan sound. If it's not working, you may need to replace it.
3. Check the defrost system: If the defrost system isn't working correctly, then ice can build up on the evaporator coils, blocking the flow of cold air. You can check the defrost system by removing the back panel inside the freezer and looking for any ice buildup. If there is a lot of ice buildup, you may need to replace the defrost thermostat, defrost timer, or defrost heater.
4. Check the condenser fan: The condenser fan is responsible for drawing air across the condenser coils to remove heat from the refrigerator. If it's not working correctly, the refrigerator will not be able to remove heat, and the freezer will not be able to freeze. You can check the condenser fan by removing the back panel and looking for any obstructions. If the fan is not running, you may need to replace it.
5. Check the compressor: The compressor is responsible for compressing the refrigerant, which cools the air in the refrigerator. If it's not working correctly, then the refrigerator won't be able to cool properly. You can check the compressor by listening for a humming sound coming from the back of the refrigerator. If you don't hear anything, or if the sound is abnormal, you may need to replace the compressor.

If none of these troubleshooting steps work, it's best to call a professional appliance repair technician to diagnose and fix the issue.

what I do is open panels to view the EVAP core
is not packed on ICE then defrost is not it.
(barking up wrong tree?)
or if is ,the defrost fan is dead.
yes some have timer others are via controller. board
the new board is wrong one or used and bad, off fleabay?

It is normal to build up frost at the Evaporator.
The Automatic-defrost-System removes the Ice 3 or 4 times, every 24 hours.(de-frosting).

1 The Fan MUST rotate , inside.
Is the Fan blowing Air inside,??
sometimes The door must be shut, then the fan-motor starts (,put your ear against the door when you close it and listen for the fan- noise,)

There may be an Automatic-Defrost fault:
Faulty :
Defrost-Timer, (electro-mecanical) ( DT ) c. fault.
Defrost-Heater,. ( DH ) common fault.
Defrost-Termination-Timer,. ( DTT)
(Over) Temperature-Fuse. ( TF )

If the Refrigerator has 'Electronic' controls,
a Computer controls the Automatic Defrosting.
A Temperature-Sensor replaces the DDT.
A Computer-controlled timer replaces the DT
----- A Sensor faulty?
-----Control Board (Computer) faulty. Common fault.

I found,-
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To 'understand' takes a little more time .
To practice, improves my skill,

With skills, it is easy to perform the task.
Experience has build up my skill & confidence.
Wisdom is, when I admit that I require additional knowledge.
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That's why I am happy.)
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solenoid for the ice dispenser flopper might get rusted, so the flop door would not close and freezer air would escape building up ice. need new solenoid assy for ice dispenser door and possible flopper.

The defrost is not working.This happens due to the evaporator coil in the inner section of freezer is got blocked by ice .--------

Try manual defrost reset procedure: ----

First unplug the unit from main power outlet. Then empty whole unit completely. Then keep both the doors open. Wait for 24 hours. All the ice collected on the coils and in the freezer section will get melted. Clean the water from the sections. Then Connect the power cord of the unit to main power outlet after 24 hours/.Then set the temperature to normal in both fridge and freezer section. It will take near to 4 hours to get run in its proper cooling cycle. Then check, if the problem returns again. If the same problem occurs then it's defrost problem. The defrost board and the defrost thermostat/heater is not functioning properly and it has to be checked and replaced.

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The procedure of this unit is as follows: --- The compressor starts then it cools the freezer section. When the freezer reaches its cooling level the defrost cycle starts functioning. In this cycle the fan in the freezer section starts running and the cool air in the freezer section is passed to the refrigerator section and the refrigerator section gets cold. The air from freezer to refrigerator passes from the section, in that section the damper is located. Now this problem which you mentioned. In this problem the freezer thaws, this happens if the thermostat is not functioning or the heater is not heating. Then the ice starts getting collected on the evaporator coil. The evaporator coil is at the internal section of freezer. If too much ice gets collected then this ice blocks the fan in the freezer section from functioning and this blocks the damper section with ice getting collected there. This all procedure is controlled by the defrost board of the unit.

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So first try reset procedure.If that is not helping then defrost assembly parts are to be checked and replaced.The defrost thermostat is located in the freezer section beside the evaporator coil.The defrost heater is located in the freezer section beside the evaporator coil.And the defrost control board is located in the fridge section.-------------

you can get the required parts from online sites like:---

www.repairclinic.com or from searspartsdirect online site.---------This will help.Thanks.Helpmech.

The Er DH error code indicates the temperature sensor on the evaporator coil did not reach 50 degrees within one hour.
This would indicate the control board did put the refrigerator through a defrost cycle.

This problem could be caused by a defective relay on the control board, a defective defrost heater, a broken wire to the heater, or a stopped up drain on the defrost pan causing ice to form on the evaporator coil.

Before replacing the control board, someone should remove the food from the freezer, remove the freezer drawer, and remove the evaporator cover to expose the evaporator coil, heater, and defrost sensor.
The voltage to the defrost heater should be 120 volts ac.
The defrost heater is part of the evaporator coil and is not replaceable as a separate part.

You can test the operation of the defrost system by pressing "Ultra Ice" and "colder freezer temp" for 3 seconds.
The first time you press and hold the buttons the board will test the compressor, fan, and open the damper.

All displays should be on.


The second time you press and hold the buttons the board will test the compressor, fan, and close the damper.

The third time you press and hold the buttons, the board will turn the compressor and fan off and turn the defrost heater on for around 25 minutes. This would let you know if the defrost system is working.

The unit has an automatic defrost system that defrosts the fridge automatically when frost develops or when certain conditions are met.

1. Defrosting starts when the compressor running time reaches 4 hours after a power outage or after the unit is turned on for the first time.
2. Defrosting starts each time the compressor running time reaches 7 hours.
3. Defrosting stops if the sensor temperature reaches 46.4°F(8°C) or more. If the sensor doesn’t reach 46.4°F(8°C) in
   2 hours, the defrost mode is malfunctioning.
4. Defrosting will not function if its sensor is defective or wires are cut or short circuited.

If your unit defrosts frequently even when the conditions above are not met, you have a malfunctioning sensor. You may have to ask the help of a qualified technician to disassemble and:

1. Check the connections of the sensor to the control board.
2. Inspect the wires for short or cut wire.
3. Push the reset button on the main board.
4. Replace the sensor control assembly.
   

Your refrigerator has a main control board part number WR55X10656 if the board is not working properly normal functions of defrost will be skipped and frost buildup will decrease cooling. The cost of the board is expensive and you may want to get more advice to get answers. Control, boards have been a real nuisance for the so called modern refrigerator. If under warrant it would be helpful. You can replace the board yourself and save the cost of a repair technician service. If you like I will help you get through this, Thanks, Sea Breeze

defrost problem. when you defrost make sure all ice is defrosted or it will turn into hard ice and will be difficult to defrost.