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

1. undefined: Check all connectors for loose connection; reseat harnesses at hinge connection points. 2. undefined: Measure voltage at CON101 pins 7–6: expected 12V. If not 12V, replace Main PCB. 3. undefined: Measure voltage at CON101 pins 3–6: expected 5V. If not 5V, replace Main PCB. 4. undefined: Measure voltage at CON101 pins 5–6: expected not 0V and not 5V (active communication). If reading is 0V or 5V static, replace Display PCB. 5. undefined: Measure voltage at CON101 pins 4–6: expected not 0V and not 5V. If static, replace Main PCB. 6. undefined: Measure voltage at CON6 pins 8–9: expected not 0V and not 5V. If static, replace Display PCB. 7. undefined: Measure voltage at CON6 pins 10–9: expected not 0V and not 5V. If static, replace Main PCB. 8. undefined: If all communication voltages are in range: explain to customer.

LG Refrigerators

Error Code CO E

Communication Error (Main PCB to Display PCB)

Moderate

Address soon - your appliance may not work properly

Also displayed as: CO E

How to Fix

1
Check all connectors for loose connection; reseat harnesses at hinge connection points.
2
Measure voltage at CON101 pins 7–6: expected 12V. If not 12V, replace Main PCB.
3
Measure voltage at CON101 pins 3–6: expected 5V. If not 5V, replace Main PCB.
4
Measure voltage at CON101 pins 5–6: expected not 0V and not 5V (active communication). If reading is 0V or 5V static, replace Display PCB.
5
Measure voltage at CON101 pins 4–6: expected not 0V and not 5V. If static, replace Main PCB.
6
Measure voltage at CON6 pins 8–9: expected not 0V and not 5V. If static, replace Display PCB.
7
Measure voltage at CON6 pins 10–9: expected not 0V and not 5V. If static, replace Main PCB.
8
If all communication voltages are in range: explain to customer.