How do I fix error code E FF on a LG refrigerators?

1. undefined: Reset the unit and enter Test Mode 1 (push test button 1 time). Check fan motor supply voltage at CON4 pins 20–19; expected 11.4–12.6V. If not in range, replace Main PCB. 2. undefined: Open freezer door and check for air flow. If no air flow detected (not windy), proceed to step 3. 3. undefined: If there is air flow but error persists, rotate the fan blade by hand. If it feels sticky/binding, replace the fan motor. 4. undefined: Check fan feed-back voltage at CON4 pins 18–19; expected 0V or 5V (not values in between). If voltage is not 0V or 5V, the motor feedback circuit is faulty — change the fan motor. 5. undefined: Check fan PWM voltage at CON4 pins 17–19; expected 0V or 5V (not between). If voltage is not 0V or 5V, replace Main PCB. 6. undefined: If all voltage checks are within spec, explain to customer.

LG Refrigerators

Error Code E FF

Freezer BLDC fan motor defect

Moderate

Address soon - your appliance may not work properly

How to Fix

1
Reset the unit and enter Test Mode 1 (push test button 1 time). Check fan motor supply voltage at CON4 pins 20–19; expected 11.4–12.6V. If not in range, replace Main PCB.
2
Open freezer door and check for air flow. If no air flow detected (not windy), proceed to step 3.
3
If there is air flow but error persists, rotate the fan blade by hand. If it feels sticky/binding, replace the fan motor.
4
Check fan feed-back voltage at CON4 pins 18–19; expected 0V or 5V (not values in between). If voltage is not 0V or 5V, the motor feedback circuit is faulty — change the fan motor.
5
Check fan PWM voltage at CON4 pins 17–19; expected 0V or 5V (not between). If voltage is not 0V or 5V, replace Main PCB.
6
If all voltage checks are within spec, explain to customer.