Samsung Dishwasher Diagnostic Mode Instructions

If you notice that your Samsung dishwasher is not operating properly, you can run the diagnostic mode to find out the problem. At the end of the diagnostic mode, an error code would be displayed, which will tell you what is wrong with the dishwasher and how it can be fixed. 

In this guide, you will learn how to enter diagnostic mode on the Samsung dishwasher and how to fix the error codes it displays.

samsung dishwasher diagnostic mode

Samsung Dishwasher Diagnostic Mode Instructions

Here are instructions on how to enter diagnostic mode for different Samsung dishwasher models:

For most Samsung dishwasher models:

  • Turn on the power to the dishwasher.
  • Press the Delay/Start button on the control panel until the display shows “17H”.
  • Hold down the High Temp button until the display shows “AS”.
  • Press and quickly release the Start button. The unit will start the test cycle, and the display will show the remaining time.

For Samsung Waterwall dishwasher (DW80J7550UG model):

  • Simultaneously press the Power button and Zone+Booster button (located under the lower rack button set).
  • After hearing a beep, press the Power button again. The display will show “00:00”.
  • Press the Auto button twice in a row under the Cycle set of buttons. The display will show “dC”.
  • Press the Power button once more and close the door. The dishwasher will run a series of tests, with the display showing the time for each test.

For Samsung dishwasher (DW80K5050US model):

  • Turn on the dishwasher.
  • Press the Delay button until the display shows “17h”.
  • Hold down the Hi-Temp wash button until the display shows “AS”.
  • Press the Start button. The dishwasher will enter test mode.

For older Samsung dishwasher models (such as DMT800RHS/XAA, DMT800RHB/XAA, DMT800RHW/XAA):

  • Press and hold the Heavy, Delicate, and Power buttons simultaneously for 2 seconds.
  • All LEDs will light up for the first 2 seconds, and then the Software Version will be indicated.
  • You can change the mode by pressing the Normal button. If the Normal button is pressed during this mode, the machine will switch to the next mode. Note: Make sure the dishwasher door is closed if you activate the mode while the dishwasher is running.

Common Samsung dishwasher Error Codes

  • OE/OC/0C/oE: This code means there is too much water in the dishwasher. Check the drain hose, sink connection, filter, sump pump, and drain for blockages. Clean them thoroughly. If the error persists, the water inlet valve or main power board may need to be replaced.
  • 1E/IE: This code indicates a clogged filter. Clean the filter located at the bottom of the dishwasher. If the error reappears after cleaning, contact a Samsung technician.
  • HE: This code indicates a water heater problem. Check the heater’s wire connections and the main power board. Replace the water heater if it’s damaged. If not, check the main power board for issues.
  • HE1: This code means the temperature inside the dishwasher is too high. It could be due to a stuck heater relay on the power board or a defective thermistor. Replace the faulty part accordingly.
  • Flashing “Heavy”: This code indicates a water leak. Inspect and tighten or replace the drain hose to resolve the issue.
  • LC/LE: This code indicates a water leak under the dishwasher due to faulty drain hoses or pump. Inspect and replace any damaged parts.
  • bE2/BE: This code occurs when a control panel button is stuck. Press each button individually to find the stuck one and unstick it. If the problem persists, replace the control panel.
  • CE: This code indicates a communication problem between the control panel and the dishwasher. Reboot the control panel by turning off and restarting the dishwasher. If the error continues, contact a Samsung technician.
  • PE: This code indicates a half-load error. Check the sump pump, diverter assembly, and motor assembly. Reconnect any loose wires and replace damaged parts if necessary.
  • 3C: This code means there is a problem with the water pump. Try rebooting the dishwasher by turning it off and on. If the error persists, consult an expert as the pump may need to be replaced.
  • 3E: This code indicates a high-temperature error. Check the water temperature setting and ensure it’s below 79°C. If the setting is correct, contact a Samsung technician.
  • 4C/4E: This code indicates a water supply problem. Check that the water supply cut-off valve is fully open and the inlet valve screen is not clogged or damaged. Inspect the wiring and connections to the valve. Replace the water inlet valve if necessary.
  • 5C/5E/SC/SE: This code means the water is not draining properly. Inspect the sink connection, drain, drainage hose, filter, and sump pump for blockages. Clean them thoroughly. If the issue persists, replace any damaged parts.
  • 7E: This code indicates a problem with the waterwall reflector. Check that it’s properly installed and remove any packaging tape if the dishwasher is new.
  • 9E: This code indicates a low water level. Ensure the dishwasher is level and check for any damaged or loose wires. Replace the water level sensor or wire harness if needed.