Welcome to our guide on how to fix Samsung dishwasher error code 7C or 7E! If you’ve encountered these error codes on your Samsung dishwasher, you’re in the right place. Dealing with appliance malfunctions can be frustrating, but with the right knowledge, troubleshooting and resolving the issue become much easier.

How to Fix Samsung Dishwasher Error Code 7C or 7E Fault Codes

In this post, we will dive into the specifics of error codes 7C and 7E, exploring their meanings, potential causes, and step-by-step solutions to get your dishwasher back up and running smoothly.

Samsung dishwasher error code 7C or 7E explained!

The Samsung dishwasher error code 7C or 7E typically indicates a problem with the water wall. The error code itself is an abbreviation for “Motor Vane Error,” indicating that the dishwasher is encountering difficulties with the motor vane responsible for controlling the movement of the water wall.

The Reason for the 7C Error Code on Samsung Dishwashers: Water Wall Issues

Here are some of the common reasons why the Samsung dishwasher error code 7C or 7E may appear:

  • Obstruction in the water wall vane: If there is something obstructing the movement of the water wall vane, such as a dish or debris, it can trigger the error code. The dishwasher’s sensors detect this obstruction and display the 7C or 7E error fault to alert you to the issue.
  • Broken belt or gear in the Motion Assy: The Motion Assy, which controls the water wall’s movement, consists of various mechanical components like tractor belt and gears. If any of these components become broken or damaged, the vane may not be able to move properly, resulting in the 7C or 7E error code.
Samsung Dishwasher Error Code 7C Broken belt
  • The oil seal is responsible for preventing water from entering the motor assembly and causing damage. If the oil seal becomes worn out or damaged, it can lead to water leakage, which triggers the error code.
Samsung Dishwasher Error Code 7C Faulty oil seal
  • Another potential cause of the 7C or 7E error code on a Samsung dishwasher is the magnet of the Assy plastic supporter. The magnet of the Assy plastic supporter plays a crucial role in indicating the position of the waterwall spray arm to the main board through a vane sensor. If the magnet becomes dislodged or damaged, it can disrupt the proper functioning of the sensor. As a result, the main board may not receive accurate information about the waterwall spray arm’s position, leading to the 7C or 7E error code.
Samsung Dishwasher Error Code 7C Magnet of the Assy plastic supporter
  • The motor vane and sensor vane are connected through wire connections. If these wires become loose, damaged, or disconnected, it can disrupt the communication between the components and the main board, triggering the 7C or 7E error code.
  • Over time, the motor vane itself may experience wear and tear, or internal components may malfunction, leading to the error code. In such cases, the motor vane may need to be replaced.
  • The main board in the dishwasher is responsible for sending and receiving signals to control various components, including the motor vane. If the main board is faulty or experiencing communication issues, it may trigger the 7C error code.

Troubleshooting Steps for Resolving the 7C or 7E Error Code on Your Samsung Dishwasher

If you encounter the 7C or 7E error code on your Samsung dishwasher, follow these troubleshooting steps to resolve the issue:

  • Inspect the water wall vane area and remove any dishes, utensils, or debris that may be obstructing its movement.
    • Clearing the path of the water wall vane can often resolve the error code.
  • Carefully inspect the Motion Assy components, such as tractor belt and gears, for any signs of damage or breakage.
    • If you notice any issues, they may need to be replaced.
  • If you suspect a faulty oil seal in the waterwall arm motor is causing the error, it is recommended to replace the waterwall spray arm motor and plastic lid and ensure proper sealing to prevent water leakage.
  • To address the issue with the magnet of the Assy plastic supporter causing the 7C or 7E error code on your Samsung dishwasher:
    1. Carefully examine the magnet of the Assy plastic supporter located near the waterwall spray arm. Look for any signs of damage, misalignment, or detachment.
    2. If the magnet is misaligned, carefully adjust its position to ensure it is properly aligned with the sensor. If the magnet is damaged or detached, it may need to be replaced.
    3. Once the magnet is realigned or replaced, run a test cycle on your dishwasher to check if the 7C or 7E error code has been resolved. Monitor the waterwall spray arm’s movement and ensure it functions properly without triggering the error code.
  • Ensure that the wire connections between the motor vane, sensor vane, and main board are secure and properly connected. Loose or disconnected wires can disrupt communication and trigger an error code.
    • Reconnect any loose wires if any are damaged.
  • If the above steps don’t resolve the issue, the motor vane itself may be faulty.
    1. To determine if the motor vane is faulty, you can perform a resistance test using a multimeter.
    2. Disconnect the power to the dishwasher and locate the motor vane.
    3. Using the multimeter set to resistance (ohms), measure the resistance across the motor vane terminals.
      • The ideal resistance reading should be around 1.7 kiloohms. If the resistance reading falls out of range from this value or shows an open or shorted circuit, it indicates a faulty motor vane. and needs to be replaced.
Samsung Dishwasher Error Code 7C Waterwall arm motor resistance measurements
  • If the troubleshooting steps you’ve already taken haven’t resolved the issue, the sensor vane itself may be faulty. Here’s how to test it using a multimeter:
    1. Safety First:
      • Wear appropriate safety gear, such as gloves.
    2. Locate and access the sensor vane:
      • Consult your dishwasher’s manual to determine the exact location of the sensor vane.
      • Carefully disassemble any necessary parts to access the sensor vane.
    3. Perform voltage tests with the dishwasher powered on, but without initiating a wash cycle.
      • Initial Voltage Test:
        • Set your multimeter to voltage mode (Vdc).
        • Measure the voltage between the black and red wires of the sensor vane connector.
        • Ideal reading: 4.98 Vdc (approximately)
        • Out-of-range reading, or OL/0 Vdc: Proceed to the next step.
      • Secondary Voltage Test:
        • Disconnect the sensor connector.
        • Measure the voltage between the brown and orange wires at the main board side of the connector.
        • Same out-of-range reading: Double-check the wire harness for damage. If the harness is intact, consider replacing the main board.
        • If 4.98 Vdc is present, proceed to Step 4.
    4. Test with a magnet:
      • Reconnect the sensor connector to the main board.
      • Measure the voltage between the white and black wires of the sensor vane connector.
      • Bring a magnet close to the sensor vane. The voltage should change from around 4.98 volts to 0 volts, and vice versa, as the magnet moves.
      • No voltage change: replace the sensor vane.
    5. Replacement:
      • If the sensor vane is confirmed to be faulty, carefully replace it with a compatible part, following the manufacturer’s instructions.
    6. Reassemble and test:
      • Reassemble the dishwasher, restore power, and run a wash cycle to ensure the issue is resolved.
Samsung Dishwasher 7c error code Sensor Vane Feedback Signal Measurements
  • If all else fails, it’s possible that the main board is damaged. In this case, replace it.


The Samsung dishwasher error code 7C or 7E indicates a problem with the water wall, specifically the motor vane. By following the suggested steps, including checking for obstructions, inspecting the motion axis, verifying wire connections, and conducting resistance tests, you can effectively address the problem. With these measures, you’ll be able to restore your dishwasher’s functionality.

  1. Want to learn a lot about the Samsung dishwasher error code list? Find out more here!
  2. Find out more about Samsung product error codes. Learn more today.

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