Whirlpool Washer Error Code 358

Error code 358 indicates an Air Inlet Thermistor Fault, identified as NTC 5. This sensor monitors the temperature of air entering the heat pump system, and the code appears when its reading is outside the expected range. The fault can be caused by a failed thermistor, damaged wiring, or a loose connector. A technician should start by running Service Mode Test 15, the Heat Pump System Test, to full completion to gather live diagnostic data.

A power reset may temporarily clear the error code from the display, but it will not resolve the underlying fault. If the thermistor or its wiring is defective, the code will return as soon as the machine attempts to operate the heat pump system again. A proper repair addressing the root cause is required to permanently clear the fault.

Repair costs depend on the root cause. Replacing the air inlet thermistor (NTC 5) is typically the least expensive fix, with parts generally ranging from around $15 to $60 and labor costs varying by region and technician rates. If the control board is at fault, parts alone can range from $100 to $300 or more. A full diagnostic visit from a qualified technician usually costs between $75 and $150 before any parts or repairs.

Some of the causes behind error 358 are DIY-friendly, such as reseating a loose connector or inspecting the wiring harness for visible damage. However, diagnosing the fault accurately requires running Service Mode Test 15 and measuring thermistor resistance, which involves working with electrical components and accessing internal parts of the machine. If you are comfortable with appliance repair and using a multimeter, you may be able to isolate and resolve the issue, but more complex causes like a control board failure are best handled by a qualified technician.

When error 358 is active, the heat pump system may be limited or disabled, meaning the machine may not complete drying cycles correctly. Running the washer in this condition is unlikely to cause immediate safety hazards, but continuing to operate it without addressing the fault risks incomplete cycles and potential strain on other heat pump components. It is best to diagnose and repair the fault before resuming normal use.