Whirlpool Washer Error Code 343

Error code 343 means the compressor motor inverter board has reported a fault. The inverter board controls the compressor or blower motor and relies on a stable AC line voltage input, specifically 102VAC to 132VAC at connector CN8. The washer stops operation when this fault is detected to prevent further damage to the motor or electronics.

Resetting the washer may temporarily clear the error code display, but if the underlying fault with the inverter board or its power supply has not been corrected, the code will return. A reset is not a fix for code 343 and should only be used after a confirmed repair to verify the fault has been resolved.

Repair costs vary depending on what is causing the fault. If the issue is only a wiring or connection problem at connector CN8, costs could be minimal. Replacing a compressor motor inverter board typically runs between $150 and $400 including parts and labor, depending on the specific model and local service rates. If the motor itself has also been damaged, total repair costs will be higher.

Some causes of error 343 can be addressed without professional help, such as checking that the washer is plugged into a properly functioning outlet with stable voltage. However, testing voltage at specific connector pins on the inverter board and inspecting internal wiring requires comfort with electrical work and a multimeter. If the inverter board itself has failed, replacing it is a more advanced repair that many technicians handle.

No, you should not continue running the washer while error code 343 is active. The fault indicates the inverter board controlling the compressor or blower motor is not operating correctly, and running the machine in this state risks further damage to the inverter board, the motor, or connected electrical components.