Maytag Washer Error Code E306

E306 indicates a thermal overload fault in the Mitsubishi inverter drive, identified by the internal THT protection circuit. It means the inverter controlling the wash motor exceeded its safe operating temperature. This typically happens during the extraction or spin cycle, especially when the power supply voltage is low or the load is too heavy.

A reset may temporarily clear the E306 code, but the fault will return if the underlying cause is not addressed. If the inverter has simply overheated due to a one-time heavy load or brief voltage sag, allowing the machine to cool and then restarting may resolve it. However, repeated occurrences indicate a persistent issue with the power supply, the load, the motor, or the inverter board itself.

If the fix is simply adjusting the load size or confirming stable power, there may be no parts cost involved. Motor bearing replacement typically ranges from around $80 to $200 depending on parts and labor. Replacing a failed Mitsubishi inverter drive board is generally the most expensive repair, often falling in the range of $200 to $500 or more with professional installation.

Start by verifying that the wall outlet provides stable, adequate voltage during the spin cycle using a multimeter. Reduce the laundry load size and make sure items are evenly distributed in the drum before retrying. If the error persists after addressing power and load issues, inspect the motor bearings and inverter board for wear or damage. A qualified technician may be needed to evaluate the inverter drive components.

The E306 fault is a protective shutdown, meaning the washer has already stopped itself to prevent damage. You should not force repeated spin cycles while the fault is active, as continued overload stress can permanently damage the inverter drive board. Address the root cause before resuming normal use.