Samsung Dryer Error Code ACA

The ACA code on a Samsung dryer signals a communication error between the main control board and the compressor inverter board. These two boards must exchange data to operate the heat pump compressor, and when that communication is interrupted the dryer stops and displays this code. The fault can stem from loose connectors, damaged wiring, or a defective board.

No, the dryer is designed to shut down when this code appears to prevent further damage. Attempting to bypass or ignore the error and run the dryer anyway could risk damage to the compressor, the inverter board, or other components. The dryer should remain off until the communication fault is properly diagnosed and repaired.

A power reset, such as unplugging the dryer for a few minutes and plugging it back in, may temporarily clear the code if the fault was caused by a transient signal issue. However, if there is an underlying problem with the wiring or a board, the ACA code will return once the dryer attempts to run. A reset is a reasonable first step but is not a substitute for proper diagnosis and repair.

If you are comfortable working inside appliances, you can start by unplugging the dryer and inspecting the wiring harness connectors between the main PBA and the compressor inverter PBA for loose or corroded contacts. Reseating connectors and cleaning terminals may resolve the error if a poor connection is the cause. However, if the fault lies in the communication circuit on one of the boards, that board will need to be replaced, which is a more advanced repair.

If the fix is simply reseating a connector, the cost may be limited to a service call fee, typically in the range of $75 to $150. If a compressor inverter PBA or main control PBA needs to be replaced, parts alone can range from $100 to $300 or more depending on the model, with additional labor costs on top of that. Getting a firm estimate from a technician after diagnosis is the best approach.