Samsung Washer Error Code TC4

TC4 indicates a temperature sensor error in the lower washer unit, specifically tied to the inverter PBA. It triggers when the motor driver in the inverter PBA reaches an unsafe temperature, or when the IPM thermistor reads as open or short circuit. The washer stops operation to prevent motor or board damage. The inverter PBA is the primary component to inspect and replace when this code appears.

No, you should not continue operating the washer while TC4 is active. The code indicates either a real overheating condition or a failed thermal protection sensor, both of which remove the safety monitoring needed to protect the motor and inverter board. Running the machine in this state risks further damage to the inverter PBA or connected components.

A power cycle may temporarily clear TC4 from the display, but the error will return if the underlying fault with the inverter PBA or IPM thermistor has not been resolved. Resetting is useful for confirming whether the fault is intermittent, but it does not address the root cause. The inverter PBA should be inspected and replaced if the code reappears after a reset.

Diagnosing TC4 requires access to the inverter PBA in the lower washer unit and some familiarity with reading circuit board connectors and wiring harnesses. A knowledgeable DIYer can check the connector at the IPM thermistor for damage or corrosion before ordering parts. However, replacing the inverter PBA itself involves working near high-voltage components, so those without electrical repair experience should have a qualified technician perform the work.

Repair costs depend on whether the fix requires only connector or wiring work versus a full inverter PBA replacement. An inverter PBA for a Samsung washer typically costs in the range of $80 to $200 for the part alone. Adding professional labor, total repair costs commonly fall between $150 and $350 depending on the service provider and washer model.