Samsung Washer Error Code 8CA4

The 8CA4 code indicates that the washer's control system has detected a fault with the MEMS (Micro-Electro-Mechanical Systems) sensor. This sensor monitors drum motion and vibration during operation. The fault may originate from a dedicated external MEMS PBA or from the main control board, depending on the model.

The MEMS sensor contributes to drum balance and spin cycle management, so continuing to run the washer with this fault active is not recommended. The machine may interrupt cycles unexpectedly or perform poorly during the spin phase. It is best to discontinue use until the fault is resolved.

A power reset may temporarily clear the code, but it will return if the underlying MEMS sensor fault is still present. Because this error points to a hardware failure in the sensor or its board, a reset alone will not resolve the problem. The appropriate PBA will need to be inspected and replaced to permanently clear the fault.

Resolving this error requires identifying whether your model has a separate external MEMS PBA or integrates the MEMS sensor into the main board. If you are comfortable working with appliance circuit boards and can safely access the internal components, replacing the appropriate board is the recommended fix. However, many homeowners prefer to have a qualified technician handle PCB replacements to avoid further damage.

Repair costs depend on whether your model requires an external MEMS PBA replacement or a full main PBA replacement. An external MEMS PBA is typically a smaller, less expensive board, so parts and labor costs will be lower compared to a full main board replacement. You can expect to pay anywhere from $100 to $350 or more depending on the specific part needed and local labor rates.