Whirlpool Washer Error Code 306

Error code 306 means the compressor motor inverter board has reported a fault. This board controls power delivery to the compressor or blower motor, and the code indicates it detected a condition preventing normal operation. The most common starting point for diagnosis is verifying that line voltage at connector CN8 falls between 102VAC and 132VAC.

No, you should not continue operating the washer while code 306 is active. The inverter board has detected a fault that prevents it from properly controlling the compressor or blower motor. Running the unit under this condition could cause further damage to the inverter board, the motor, or related components.

A reset may temporarily clear the display, but code 306 will return if the underlying fault has not been corrected. Because this fault is reported by the inverter board itself in response to a real electrical condition, resetting the machine without diagnosing the cause is not a lasting solution. The voltage at CN8 and the condition of the board and motor must be evaluated.

Some causes of code 306, such as a low household voltage or a loose connector at CN8, can be addressed without replacing parts. However, diagnosing this fault requires a multimeter to measure AC voltage at specific connector pins, which is a task best suited to technicians or experienced DIYers comfortable working with live voltage. If the inverter board or compressor motor needs replacement, professional service is recommended.

Repair costs depend on the root cause. If only a wiring connection needs to be reseated, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing a compressor motor inverter board generally adds parts and labor costs, often bringing the total to somewhere between $200 and $500 depending on the specific model and local labor rates.