LG Washer Error Code E-51

E-51 on an LG washer indicates an EEPROM open error, meaning the control board cannot detect or communicate with the EEPROM memory chip. This chip stores operational settings and calibration data the washer needs to function. The fault is classified as a sense failure because the board is receiving no valid signal from the chip. The washer will not run normally until the issue is corrected.

A simple power reset is unlikely to permanently clear the E-51 error because it points to a physical connection or hardware failure with the EEPROM chip rather than a software glitch. The machine may restart briefly but will likely detect the fault again once it attempts to read the chip. The underlying issue, whether a loose or faulty EEPROM, needs to be addressed for the error to clear.

If only the EEPROM chip needs replacement, parts cost is generally low, typically in the range of a few dollars to around $20 depending on the chip. If the repair requires professional labor, expect to pay $75 to $200 or more depending on your location and the technician. If the control board itself is damaged and needs full replacement, costs can rise significantly, often ranging from $150 to $400 or higher for parts and labor combined.

Start by checking whether the EEPROM chip, either R4LCO40 or 24LCO4, is properly seated in its socket on the control board. Power down the washer completely before inspecting the chip. If the chip appears loose or misaligned, reseat it firmly and restart the machine. If the error persists after reseating, the EEPROM chip should be replaced.

You should not attempt to run the washer while the E-51 error is active. The EEPROM stores essential operational data, and without a working chip the control board cannot safely manage cycles, motor operation, or other critical functions. Attempting to force operation could lead to unpredictable behavior. Address the EEPROM issue before resuming normal use.