Whirlpool Washer Error Code 357

Error code 357 indicates an Air Outlet Temperature Sensor Fault, specifically involving the NTC 4 sensor in the heat pump system. The sensor is sending a temperature reading that falls outside the expected operating range, which causes the washer to stop the cycle. The first diagnostic step is running service mode test 15, the Heat Pump System Test, to determine whether the fault is in the sensor, the wiring, or the broader heat pump assembly.

It is not recommended to continue running the washer while error 357 is active. The heat pump temperature sensor monitors a critical part of the thermal system, and operating without accurate temperature data could lead to overheating or ineffective cycle performance. Leave the washer off until the fault is diagnosed and resolved.

A power reset may temporarily clear the error code, but if the underlying fault with the NTC 4 sensor or heat pump system remains, the code will return once the washer runs through a cycle again. A reset should not be used as a substitute for proper diagnosis. Running service mode test 15 is the correct first step to identify and address the actual cause.

Some causes of error 357 are DIY-accessible, such as reseating a loose wiring connector or inspecting the harness for visible damage. However, properly diagnosing this fault requires running service mode test 15 and potentially measuring sensor resistance, which requires familiarity with appliance diagnostics. If the heat pump assembly itself is involved, professional repair is strongly recommended.

Repair costs vary depending on the root cause. Replacing the NTC 4 temperature sensor is generally a lower-cost repair, with parts typically ranging from $15 to $60 and labor adding $80 to $150 depending on the service provider. If the heat pump assembly or control board requires replacement, total repair costs can range from $200 to $500 or more.