Whirlpool Washer Error Code 354

Error code 354 signals a Compressor Discharge Thermistor Fault, designated NTC 1. It means the temperature sensor at the compressor outlet in the heat pump system is reading a value outside the acceptable range. This could be due to a failed sensor, wiring problem, or an actual issue with the compressor or refrigerant system. The machine flags this code to prevent potential damage to the heat pump components.

A basic power reset may temporarily clear the code, but it will return if the underlying fault is still present. Because code 354 relates to a sensor reading that is continuously monitored by the control board, the fault will reappear as soon as the machine attempts to use the heat pump system again. A proper diagnosis and repair of the thermistor, wiring, or related component is required to permanently resolve the code.

Repair costs depend on the root cause. If only the NTC 1 thermistor needs replacement, parts are generally in the range of $15 to $50, with labor adding $75 to $150 depending on the technician and region. If the fault involves the wiring harness, control board, or a refrigerant system issue, total repair costs could range from $150 to $400 or more. Getting a diagnostic visit from a qualified technician will give a more accurate estimate for your specific situation.

The correct first step is to run Service Mode Test 15, which is the Heat Pump System Test, and allow it to run to full completion. This diagnostic test exercises the heat pump circuit and helps isolate whether the fault is in the thermistor sensor, the connecting wiring harness, or elsewhere in the heat pump system. After the test completes, check the connector at the NTC 1 thermistor and inspect the wiring for damage or corrosion before replacing any parts.

The washer may restrict or disable heat pump related functions when this code is active, which is a built-in protection measure. Continuing to operate the machine while the fault is unresolved could risk further damage to the compressor or heat pump system. It is best to complete the diagnosis and repair before running full wash or dry cycles.