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Error code reference

LG Refrigerator Error Code Pc - E

Pantry Room Display communication error

LG codesLG refrigerator codes

Pantry Room Display communication error — Panel ↔ MAIN MICOM communication error displayed on Pantry Room Display (0.5 sec ALL ON, 1.5 sec ALL OFF alternately).

First step from the service manual

Check cable connections between pantry panel and main PCB.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What Pc - E means on a LG refrigerator

The Pc - E error code on an LG refrigerator indicates a communication failure between the pantry room display panel and the main control board (MAIN MICOM). The pantry compartment uses a dedicated sub-panel to control and display temperature settings independently from the main refrigerator and freezer displays. This sub-panel communicates with the main PCB via a data cable, and when that communication signal is lost or corrupted, the Pc - E code is triggered. The error presents with a distinctive flashing pattern on the pantry room display: all segments illuminate for 0.5 seconds, then all segments go dark for 1.5 seconds, repeating in a continuous cycle.

The most common root cause is a loose, damaged, or improperly seated cable connecting the pantry panel to the main PCB. These ribbon or harness cables can work themselves loose over time due to vibration, or they may be pinched or damaged during routine maintenance. Beyond physical connection issues, the pantry display panel itself can develop internal faults that prevent it from sending or receiving data correctly. In some cases, the main control board may be the origin of the fault if it is unable to initiate or maintain the communication signal on its end.

Diagnosis should begin by inspecting all cable connections between the pantry panel and the main PCB, checking for loose connectors, bent pins, or visible damage to the harness. If connections appear intact, the next step is to evaluate whether the pantry panel or the main board requires replacement. Because the error specifically originates and displays on the pantry room panel, that component is often the more likely point of failure when wiring checks out.

Source: manufacturer service documentation.

Common causes of Pc - E

  1. 01

    Loose or disconnected cable between pantry panel and main PCB

    Wiring / connection

    The wiring harness or ribbon cable connecting the pantry display to the main control board may have come loose from its connector. Inspect both ends of the cable and reseat any connectors that are not fully engaged.

  2. 02

    Damaged or pinched wiring harness

    Part replacement

    The cable running between the pantry panel and main board may be physically damaged, pinched, or have broken wires inside the insulation. Look for visible cuts, kinks, or areas where the harness is routed against sharp edges.

  3. 03

    Faulty pantry room display panel

    Part replacement

    The pantry sub-panel itself may have an internal failure that prevents it from communicating over the data line. If wiring checks out, the panel board is the next component to suspect and test.

  4. 04

    Failed main control board (MAIN MICOM)

    Part replacement

    If the main PCB is unable to send or receive communication signals to the pantry panel, the Pc - E code can result. This is less common than a panel or wiring fault but should be considered after other causes are ruled out.

See the test procedure for each cause

Frequently asked questions about Pc - E

What does Pc - E mean on a LG refrigerator?
The Pc - E code indicates a communication error between the pantry room display panel and the main control board (MAIN MICOM). The pantry display will flash with all segments on for 0.5 seconds and all segments off for 1.5 seconds in a repeating cycle. This means the two components have lost the ability to send and receive data from each other. The cause is typically a loose cable, damaged wiring, or a faulty pantry panel or main board.
How do I fix the Pc - E error on my LG refrigerator?
Start by checking the cable connections between the pantry display panel and the main PCB, reseating any connectors that are loose or not fully inserted. Inspect the wiring harness for visible damage such as cuts or pinching. If connections are secure and undamaged, the pantry display panel or the main control board may need to be replaced to resolve the fault.
Will resetting my LG refrigerator clear the Pc - E error?
A power reset by unplugging the refrigerator for a few minutes may temporarily clear the display, but the error will return if the underlying communication fault has not been resolved. If a loose cable connection is the cause, reseating the connector before resetting may resolve the issue permanently. A reset alone will not fix a damaged harness or failed panel.
Is the Pc - E error on my LG refrigerator a safety concern?
The Pc - E error is a communication fault specific to the pantry compartment display and does not indicate a hazardous condition such as a refrigerant leak or electrical short. However, the pantry compartment temperature control may not function correctly while the error is active, which could affect food stored in that section. It is advisable to address the fault promptly to ensure proper temperature management.
How much does it cost to repair the Pc - E error on an LG refrigerator?
If the fix is simply reseating a loose cable, there may be no parts cost at all, though a service call fee would typically apply if a technician is involved. Replacing the pantry display panel generally costs in the range of $75 to $200 or more for the part, plus labor. A main control board replacement is more expensive, with parts alone often ranging from $150 to $350 depending on the model.

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