Error code reference

Amana Dishwasher Error Code 1-2

Control software issue

Amana codesAmana dishwasher codes

Control software issue - damaged or corrupted memory on control board or incompatible software components inside micro.

First step from the service manual

Unplug dishwasher or disconnect power. Replace control board.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 1-2 means on a Amana dishwasher

The Amana dishwasher error code 1-2 signals a control software fault originating inside the main control board. Specifically, the microcontroller has detected either damaged or corrupted memory, or incompatible software components within the micro itself. This is not a sensor fault or a mechanical failure. The problem lives entirely within the control board's internal firmware or memory storage, making external diagnostics largely ineffective. The correct response is to cut power and replace the control board.

For homeowners, think of the control board as the brain of your dishwasher. It runs the software that coordinates every cycle, valve, pump, and sensor. When error code 1-2 appears, the board is reporting that its own internal memory has been damaged or that the software components it relies on are not working together correctly. This can happen after a power surge, a failed firmware update, or simply through component degradation over time. Because the problem is inside the chip itself, resetting or cleaning connections will not fix it. The board needs to be replaced.

There is no field repair for corrupted or damaged onboard memory. A power reset may temporarily clear the display, but the error will return once the control board attempts to run its software again.

Source: manufacturer service documentation.

Common causes of 1-2

  1. 01

    Corrupted control board memory

    Part replacement

    The onboard memory chip has been damaged and can no longer store or retrieve the software data needed to run the dishwasher. This is the most direct cause of error code 1-2 and requires full control board replacement.

  2. 02

    Incompatible software components within the microcontroller

    Part replacement

    The software modules inside the micro are mismatched or have become internally inconsistent, preventing the control board from executing its program correctly. This condition cannot be corrected through reprogramming in the field.

  3. 03

    Power surge damage to the control board

    Part replacement

    A voltage spike from a power outage or faulty electrical supply can corrupt the memory or damage the microcontroller, triggering error code 1-2. The board itself sustains the damage and must be replaced.

  4. 04

    Failed or incomplete control board update

    Part replacement

    If the control board received a software component that is incompatible with the rest of the micro, the board can enter a permanent error state. Replacing the board with a correctly matched unit resolves this.

See the test procedure for each cause

Frequently asked questions about 1-2

What does error code 1-2 mean on an Amana dishwasher?
Error code 1-2 on an Amana dishwasher means the main control board has detected a software fault. Either the onboard memory is damaged or corrupted, or the software components inside the microcontroller are incompatible with each other. This is an internal board issue and cannot be fixed by resetting the dishwasher or checking connections.
How do I fix error code 1-2 on an Amana dishwasher?
Start by unplugging the dishwasher or shutting off its circuit breaker to cut power completely. The fix for error code 1-2 is replacement of the main control board. Because the fault is inside the microcontroller's memory or software, no amount of resetting or cleaning will correct it. Order a compatible replacement control board for your specific Amana model and swap the board out.
Can I still use my Amana dishwasher with error code 1-2 active?
You should not continue running the dishwasher with error code 1-2 active. A corrupted or damaged control board cannot reliably manage the cycle, valves, or pump. Running the appliance in this condition risks incomplete cycles, water not draining properly, or unpredictable behavior that could cause water damage.
How much does it cost to fix error code 1-2 on an Amana dishwasher?
A replacement Amana dishwasher control board typically costs between $80 and $200 depending on the model. If you hire a technician, expect to add $100 to $200 in labor, bringing the total repair to roughly $180 to $400. The repair itself is moderately DIY-friendly since it involves disconnecting a wiring harness and swapping the board, but if you are not comfortable working with appliance electronics, a professional repair is a reasonable option.
Will resetting my Amana dishwasher clear error code 1-2?
A power reset may temporarily clear the display, but error code 1-2 will return once the control board attempts to run its software again. The underlying cause is physical damage or corruption inside the board's memory or microcontroller, which a reset cannot repair. Replacing the control board is the only lasting fix.

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