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

1. undefined: Step 1: Check all connector connections for looseness. Check hinge area for harness pinching. 2. undefined: Step 2: Check voltage in display at CON101 16th~18th pin. Expected: 11.5~12.5V. If not, change the Main PCB. 3. undefined: Step 3: Check voltage in display at CON101 16th~10th pin. Expected: 5~7.5V. 4. undefined: Step 4: Check voltage in display at CON101 16th~14th pin. Expected: Not 0V or 5V (should be pulsing). If 0V or 5V, change the Display PCB. 5. undefined: Step 5: Check voltage in display at CON101 16th~12th pin. Expected: Not 0V or 5V. If 0V or 5V, change the Main PCB. 6. undefined: Step 6: Check voltage in Main PCB at CON5 15th~17th pin. Expected: Not 0V or 5V. If 0V or 5V, change the Display PCB. 7. undefined: Step 7: Check voltage in Main PCB at CON5 15th~18th pin. Expected: Not 0V or 5V. If 0V or 5V, change the Main PCB. 8. undefined: Step 8: If all checks pass, explain to customer.

LG Refrigerators

Error Code E CO

Abnormal Communication Error — Connection line between main control panel and display panel is short or open. Signal transmission fails.

Moderate

Address soon - your appliance may not work properly

Also displayed as: E CO

How to Fix

1
Step 1: Check all connector connections for looseness. Check hinge area for harness pinching.
2
Step 2: Check voltage in display at CON101 16th~18th pin. Expected: 11.5~12.5V. If not, change the Main PCB.
3
Step 3: Check voltage in display at CON101 16th~10th pin. Expected: 5~7.5V.
4
Step 4: Check voltage in display at CON101 16th~14th pin. Expected: Not 0V or 5V (should be pulsing). If 0V or 5V, change the Display PCB.
5
Step 5: Check voltage in display at CON101 16th~12th pin. Expected: Not 0V or 5V. If 0V or 5V, change the Main PCB.
6
Step 6: Check voltage in Main PCB at CON5 15th~17th pin. Expected: Not 0V or 5V. If 0V or 5V, change the Display PCB.
7
Step 7: Check voltage in Main PCB at CON5 15th~18th pin. Expected: Not 0V or 5V. If 0V or 5V, change the Main PCB.
8
Step 8: If all checks pass, explain to customer.

This Error Applies To

LG LHSXS2706 Series Refrigerators

Service manual exact match: LHSXS2706SService manual exact match: LHSXS2706VService manual exact match: LHSXS2706DService manual exact match: LHSXS2706W

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