CHECK AND TEST 1

Step 1

Unscrew cover of mainboard with a Cross-head screwdriver. 

Step 2

In PCB area, check if
terminal is pushed into
final position.
IF NOT, PUSH IT INTO PROPER
FINAL POSITION.

Step 3

In PCB, check to see if
terminal is full of foam.

IF SO, USE TWEEZERS
TO REMOVE FOAM.

Step 4

In PCB area, use
multimeter to measure
resistance value.

Step 5

Take note of the test
result.

Step 6

Use infrared detector to
measure the temperature
of freezer air duct in area shown in
red circle on right, use tested value as reference
temperature for defrost
temp. sensor.


Step 7

Test temperature of freezer
air duct.


Note
Use tested reference
temperature to find out
standard resistance
value in table 1 below.

DIAGNOSIS 1


PROCEDURE 1

Step 1

Remove the freezer
drawer.

Step 2

Remove the middle
glass shelf located
between upper and
bottom freezer drawer
compartments.

Step 3

Unscrew 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 all three
screws with Crosshead
screw driver.

Step 4

Dismantle the air duct.

a. Catch the bottom of
air duct.

b. Pull air duct out from
below from the bottom
of air duct.

c. Pay attention to the

connectors when
pulling out the air
duct.

d. Disconnect the
terminal for fan motor.


e. Disconnect the
terminal of temp.
sensor.

f. Take the air duct
out of the freezer
compartment.

g. Remove air duct.

CHECK AND TEST 2

Step 1

Use a multimeter to
measure the resistance
value of defrost temp.
sensor from terminal
located in freezer.

a. Insert the detectors
into terminal and
make sure connection
is good;

b. Read the value;

Step 2

Measure the temperature
of defrost temp. sensor.

DIAGNOSIS 2


PROCEDURE 2


Step 1

Disconnect the terminal.

Step 2

Cut off plastic tie.

Step 3

Take sensor out of the
plastic buckle.
REVERSE STEPS
ABOVE TO INSTALL
DEFROST SENSOR.

CHECK AND TEST 3

Step 1

Check to see if the
terminal is full of foam.
IF SO, USE TWEEZERS
TO CRUSH AND
REMOVE FOAM.

Step 2

Make sure sensor is
properly located by
comparing with photo
on right.
IF SENSOR IS NOT IN
SAME POSITION AS
PHOTO, FIX IT.

Step 3

Check to see if sensor
wires have been cut off;
if so, follow procedures
below to rework.

DIAGNOSIS 3

PROCEDURE 3


Step 1
Cut off the wire.


Step 2

Peel off the sleeves.



Step 3

Check for proper wire
order, then connect
them.

Step 4

Tin soldering.



Step 5

Cover point of
connection with
electrical tape.

CHECK AND TEST 4

Step 1

After confirming that the
sensor and terminals
are OK, or replacing the
sensor, reconnect the
terminal.

Step 2

Use a multimeter to
measure the resistance
value of defrost temp.
sensor from terminal
located in mainboard
area.

a. Insert the detectors
into terminal and
make sure connection
is good;
b. Read the value;

Step 3

Measure the temperature
of sensor.

NOTE

DIAGNOSIS 


PROCEDURE 4


Tip 1

When re-installing the air
duct, move the wires out
of the way so that they
won’t be crushed by air.


Tip 2
After pushing air duct
into position, it should
make a click sound. If no
click is heard, do it again.

GO BACK TO COMPONENT LIST