GE Washer Error Code 343

Error code 343 on a GE washer means the compressor motor inverter board has detected and reported a fault. The inverter board controls the compressor motor operation, and when it cannot function correctly it triggers this code and interrupts the cycle. Diagnosing the code starts with confirming that the AC supply voltage at connector CN8, pin 4 to pin 1 is between 102 and 132 VAC.

You should not attempt to continue using the washer while error code 343 is active. The compressor motor inverter board has reported a fault, which means the compressor is not operating correctly. Running the machine in this condition could worsen the underlying fault, potentially causing additional component damage.

A reset may temporarily clear error code 343 from the display, but if the underlying fault condition is still present, the code will return once the washer attempts to operate the compressor again. Resetting without diagnosing and correcting the root cause, whether it is a voltage issue, a bad connection, a failed inverter board, or a faulty compressor motor, will not resolve the problem permanently.

Some causes of error code 343 are DIY-friendly, such as checking the circuit breaker, confirming the outlet voltage, or reseating the CN8 connector on the inverter board. However, measuring live AC voltage at board connectors requires a multimeter and comfort working around energized components. If the inverter board or compressor motor needs replacement, many experienced DIYers can handle the repair, but those unfamiliar with appliance electrical systems should contact a qualified technician.

Repair costs depend on the root cause. If the issue is simply a voltage supply problem or a loose connector, the cost could be minimal, covering only a service call fee in the range of $75 to $150. If the compressor motor inverter board requires replacement, parts and labor combined typically range from $200 to $450 or more depending on your location and the specific model.