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

1. undefined: Reset the unit. Enter Test Mode 1 (push test button 1 time). 2. undefined: Measure fan motor voltage at CON4 pins 24th~23rd. Should be 11.4~12.6V. 3. undefined: If NOT 11.4~12.6V: replace Main PCB. 4. undefined: If correct: check condenser fan rotation. If fan does not rotate: go to step 3. 5. undefined: If fan rotates: check feedback voltage at CON4 pins 22nd~23rd. Should be not 0 or 5V. If 0 or 5V: replace condenser fan motor. 6. undefined: Step 3 - Rotate fan by hand. If sticky/seized: replace fan motor. 7. undefined: Check PWM voltage at CON4 pins 21st~23rd. Should be not 0 or 5V. If 0 or 5V: replace Main PCB. 8. undefined: If all pass: explain to customer.

LG Refrigerators

Error Code E CF

Defect of BLDC fan motor for machine room (condenser fan)

Moderate

Address soon - your appliance may not work properly

How to Fix

1
Reset the unit. Enter Test Mode 1 (push test button 1 time).
2
Measure fan motor voltage at CON4 pins 24th~23rd. Should be 11.4~12.6V.
3
If NOT 11.4~12.6V: replace Main PCB.
4
If correct: check condenser fan rotation. If fan does not rotate: go to step 3.
5
If fan rotates: check feedback voltage at CON4 pins 22nd~23rd. Should be not 0 or 5V. If 0 or 5V: replace condenser fan motor.
6
Step 3 - Rotate fan by hand. If sticky/seized: replace fan motor.
7
Check PWM voltage at CON4 pins 21st~23rd. Should be not 0 or 5V. If 0 or 5V: replace Main PCB.
8
If all pass: explain to customer.