Put your hand in front of your air vent that's located inside the refrigerator section and see if you feel cold air coming out of it, it should be strong flow of cold air, if not then keep your hand in front of it and open your freezer door and see if the cold air flow increases.
Also when you open your freezer door do you hear your evaporator(freezer) fan motor running?
Then also take some food out of the freezer and look/feel the back panel inside the freezer to see if there is frost build-up on it.
The forced defrost function is performed using the refrigerator display and keypad. Enter the Forced Defrost Mode by performing the following sequence of events:
1. Hold the refrigerator door light switch closed.
2. Press the Refrigerator Temperature DOWN /- keypad 3 times consecutively.
Note: The 3 keystrokes must be consecutive and within 10 seconds.
3. Release the refrigerator door light switch.
4. The control will display F- d to confirm entry into the Forced Defrost Mode.
5. Entry is confirmed by pressing the Refrigerator Temperature DOWN /- key once more. The unit is off and in the Defrost Mode.
Note: All control functions will be turned off (Compressor, Defrost, Evaporator Fan, the damper will remain in its current position
6. The control will default to the short run period test.
Note: You can toggle between the S Short and L Long test mode by pressing the Refrigerator Temperature UP /+ Key. Long Test mode is used for factory test and should not be used in the field.
7. Once the desired mode is displayed, confirm the forced defrost by pressing the Refrigerator Temperature DOWN /- Key once. The defrost will begin immediately and the display will return to a normal operating display with set point values.
8. Close the Refrigerator door(s). You are in the defrost mode.
Note: Forced Defrost mode can be exited at any time prior to step 7 by closing the Refrigerator Door(s).
took everything out of fridge. opened doors,unplugged, and let it sit overnite. replaced the damper control, cleaned up all the water on the floor and plugged it back in and is working fine. thanks for the direction for this very inexpensive repair.