GE Washer Error Code 340

Error code 340 on a GE washer indicates a Compressor Motor Inverter Fault. The inverter board that controls the compressor motor has detected and reported a fault condition. This causes the washer to stop operating in order to protect the motor and drive components. The fault can stem from incorrect supply voltage, a wiring issue, or a failed inverter board.

No, it is not safe to continue running the washer while code 340 is active. The error indicates a fault in the inverter board driving the compressor motor, and continued operation could cause additional damage to the motor, the board, or connected components. Stop using the machine until the fault has been diagnosed and resolved.

A reset may temporarily clear the error code display, but it will not resolve the underlying fault causing code 340. If the inverter board, supply voltage, or wiring issue is not corrected, the fault will return when the machine attempts to run again. A proper diagnosis of the line voltage at CN8 and the condition of the inverter board is necessary to permanently resolve the error.

Some causes of code 340 can be addressed without specialized tools, such as checking and resecuring the wiring connector at CN8 or verifying that the wall outlet is supplying proper voltage. However, testing live AC voltage at internal board connectors and replacing the inverter board require comfort with electrical diagnostics and should only be attempted by someone experienced with appliance repair. If you are unsure, contacting a qualified technician is the safer approach.

Repair costs vary depending on the root cause. If the fix involves only reseating a connector or addressing a wiring issue, costs could be limited to a service call fee, typically in the range of $75 to $150. If the compressor motor inverter board needs replacement, parts alone can range from $100 to $300 or more, with labor adding to the total. A compressor motor replacement would be significantly more expensive.