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

1. undefined: Inspect all connectors in the communication path (CON101 hinge connector, CON5) for loose or damaged connections. Reseat all connectors. 2. undefined: Measure CON101 Pin 18 ~ Pin 16: should be 12 V. If absent, check hinge wiring for loose connection; if hinge is good, replace Main PCB. 3. undefined: Measure CON101 Pin 10 ~ Pin 16: should be 5 V. If absent, check hinge wiring; if hinge is good, replace Main PCB. 4. undefined: Measure CON101 Pin 14 ~ Pin 16: should NOT be 0 V or 5 V (it is a data signal). If it IS 0 V or 5 V (stuck), replace Display PCB. 5. undefined: Measure CON101 Pin 12 ~ Pin 16: should NOT be 0 V or 5 V. If stuck at 0 or 5 V, replace Main PCB. 6. undefined: Measure CON5 Pin 4 ~ Pin 3: should NOT be 0 or 5 V. If stuck, replace Display PCB. 7. undefined: Measure CON5 Pin 5 ~ Pin 3: should NOT be 0 or 5 V. If stuck, replace Main PCB. 8. undefined: If all voltages are correct, explain to customer (intermittent connection issue).

LG Refrigerators

Error Code E CO

Communication error between main MICOM and display MICOM

Moderate

Address soon - your appliance may not work properly

Also displayed as: E CO

How to Fix

1
Inspect all connectors in the communication path (CON101 hinge connector, CON5) for loose or damaged connections. Reseat all connectors.
2
Measure CON101 Pin 18 ~ Pin 16: should be 12 V. If absent, check hinge wiring for loose connection; if hinge is good, replace Main PCB.
3
Measure CON101 Pin 10 ~ Pin 16: should be 5 V. If absent, check hinge wiring; if hinge is good, replace Main PCB.
4
Measure CON101 Pin 14 ~ Pin 16: should NOT be 0 V or 5 V (it is a data signal). If it IS 0 V or 5 V (stuck), replace Display PCB.
5
Measure CON101 Pin 12 ~ Pin 16: should NOT be 0 V or 5 V. If stuck at 0 or 5 V, replace Main PCB.
6
Measure CON5 Pin 4 ~ Pin 3: should NOT be 0 or 5 V. If stuck, replace Display PCB.
7
Measure CON5 Pin 5 ~ Pin 3: should NOT be 0 or 5 V. If stuck, replace Main PCB.
8
If all voltages are correct, explain to customer (intermittent connection issue).

This Error Applies To

LG LRFGC2706S Series Refrigerators

Service manual exact match: LRFGC2706SService manual exact match: LRFGC2706VService manual exact match: LRFGC2706DService manual exact match: LLFGC2706SService manual exact match: LLFGC2706VService manual exact match: LLFGC2706D

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