LG LFX28968D Service Manual page 37

Freezer Fan Error (E FF)
1 Reset the unit and
Input Test1 Mode.
(Push the button 1 time)
2
Open the freezer door and Check
the air flow. Windy?
Yes
Go to 4
3
Check the Fan motor.
Rotate fan using hand.
It feel sticky?
Fan Motor
No Go to 3
Change the
Yes
Fan motor
4
Check the Fan Motor voltage
Is Fan Motor voltage 8~12V?
TEST MODE 1
CON7
th th
10 pin ~ 12 pin
Yes
5
Check the Fan Motor voltage
Is Fan Feed Back voltage 0V, 5V?
TEST MODE 1
CON7
th th
8 pin ~ 12 pin
No
6
Explain to customer
Replace
No
Main PCB
CON7
Voltage [V]
8~12V
Change the
Yes
motor
CON7
Voltage [V]
Not 0V, 5V