Amana Dryer Error Code 4

Error code 4 on an Amana dryer signals a possible motor transistor fault detected during the startup sequence. The control board has identified that the motor transistor appears open or shorted, which can prevent the drive motor from operating. This may be caused by a loose connection in the motor circuit or an actual failure of the machine control board.

It is best to avoid using the dryer until the cause of the error has been identified. A shorted motor transistor can potentially cause unintended current flow in the motor circuit, which may lead to further component damage. Completing the System Check Mode diagnostic first will clarify whether the dryer is safe to continue operating.

If the issue is simply a loose connection, the repair can cost very little beyond your time. If the machine control board requires replacement, parts and labor typically range from around $150 to $350 depending on the specific board and local labor rates. Getting a diagnostic estimate from a qualified technician before committing to the repair is advisable.

A knowledgeable DIYer can start by inspecting all wiring connections in the motor circuit for looseness or corrosion, which requires no parts. If connections are secure, running the System Check Mode to test the motor relay function will indicate whether the control board needs replacement. Replacing the machine control board is a more advanced repair but is within reach for someone comfortable working with appliance electronics.

A reset may temporarily clear the code, but it will likely return if the underlying cause is not addressed. If the error was triggered by a transient electrical event, System Check Mode can confirm the relay functions properly and the code can be disregarded. If the motor relay fails during that check, the control board must be replaced before the error will clear permanently.