Whirlpool Washer Error Code 303

Error code 303 indicates a Compressor Motor Inverter Fault. The inverter board that controls the compressor or blower motor has reported an internal fault condition. This causes the washer to stop operation. Diagnosis starts with checking whether the board is receiving the correct line voltage of 102VAC to 132VAC at connector CN8.

No, you should not continue operating the washer while code 303 is active. The washer has shut down to protect the motor and inverter board from further damage. Running it in a fault state could worsen the underlying problem and increase repair costs. Address the fault before resuming normal use.

A power reset may temporarily clear the error code, but if the underlying fault condition still exists, the code will return when the washer attempts to operate the compressor or blower motor again. A reset is useful for ruling out a one-time electrical glitch, but persistent or recurring code 303 requires proper diagnosis of the inverter board input voltage, wiring, and motor condition.

Some causes of error code 303 can be addressed without professional help, such as resetting a tripped breaker or ensuring the washer is on a properly functioning outlet. However, testing voltage at connector CN8 and inspecting wiring or motor windings involves working with live AC voltage and requires appropriate safety precautions. Replacing an inverter board is within the skill range of experienced DIYers, but if you are not comfortable with electrical testing, a technician is recommended.

Repair costs depend on the root cause. If only a wiring issue or connection problem is found, costs could be minimal, generally in the range of a service call fee. If the inverter board requires replacement, parts and labor combined could range from around $150 to $400 or more depending on your location and the specific model. If the compressor motor itself has failed, costs will be higher.