CHECK AND TEST 1

Step 1

Unscrew cover of mainboard with a Cross-head screwdriver.

Step 2

Check if terminal in PCB area is pushed to final position.

If not, reinsert it to final position.

Step 3

Set multimeter to resistance gear.

Step 4

In PCB area, measure the resistance of defrost temp. sensor with a multimeter.

Step 5

Take note of value.

Step 6

Measure the temperature of freezer air duct, near the defrost temp. sensor.
Use measured temperature to find the standard resistance value in Temperature-Resistance Chart for Sensor.

DIAGNOSIS 1


PROCEDURE 1


Step 1

Remove all freezer drawers.

Step 2

Remove all glass shelves.

Step 3

Unscrew the screws on air duct.
a. Check the freezer air duct to find the three screw covers.
b. Remove the screw covers (total of three) on the air duct with slotted screw driver.

c. Unscrew the screws (total three) with Cross-head screw driver.

Step 4

Dismantle the air duct.

a. Catch the bottom of air duct and pull down the air duct.

b. Pay attention to the connectors when pulling out the air duct.

c. Disconnect the terminal for fan motor.
Disconnect the terminal for freezer temp. sensor.

d. Move the air duct out of the freezer compartment.

CHECK AND TEST 2

Step 1

Check if terminal is inserted to final position.

If not, please re-insert it to final position.

Step 2

Check if sensor is attached in proper position, as shown in picture.

If not, correct it.

Step 3

Check if wire of defrost sensor is broken.

If yes, replace it with a new one

Step 4

Disconnect terminal of defrost temp. sensor.

Step 5

Check if the terminal is stuffed with foam.

If so, use tweezers to smash it and remove.

Step 6

Measure resistance of defrost temp. sensor from terminal in freezer, and take note of it.

Step 7

Measure the temperature of defrost temp. sensor.

DIAGNOSIS 2


CHECK AND TEST 3

Step 1

Set multimeter to resistance gear.

Step 2

Put detector into one end of wires in PCB area.

Put another detector into end of wires behind air duct.

DIAGNOSIS 3


PROCEDURE 2

Tip 1

Make sure the sealing sponges are in good condition.

Tip 2

When reinstalling the air duct, fasten the wires to avoid crushing with air duct.

Tip 3

Install the top side first when installing the air duct.

Tip 4

After pushing air duct into place, you should hear a clicking sound. If not, repeat again.

Tip 5

Check to see if there is
a wide gap between air duct and cabinet. If there is, reinstall air duct.

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