Is your Samsung washer acting strangely? Don’t despair! Built-in diagnostic modes can help you identify the problem. This guide will walk you through running diagnostic mode on both Samsung front-load and top-load washers.

Run Diagnostic Mode on Your Samsung Washer (Front and Top Load)
Run Diagnostic Mode on Your Samsung Washer (Front and Top Load)

Important Note: Before starting, ensure your washer is empty.

How to Activate Diagnostic Mode on Your Samsung Washer

Let’s dive into how to run diagnostic mode on both Samsung front-load washers and top-load washers. Diagnostics can help troubleshoot issues and identify error codes. Here’s a step-by-step guide for each type:

Running Diagnostics on Samsung Front-Load Washers:

  1. Power On: Turn on your washer.
  2. Set Delay End:
    • If connected to SmartThings, set a delay end 17 hours ahead (e.g., if it’s currently 5 p.m., set it to 10 a.m.).
    • If not connected, directly set the delay end for 17 hours.
  3. Enter Diagnostic Mode:
    • Press the END/DELAY button repeatedly until “17” appears on the display.
    • Hold the START button for 7–10 seconds. If “AS” appears, you’re in diagnostic mode!
  4. Watch the test cycle:
    • Press “START” again to begin the tests. The washer will run various tests, displaying codes on the screen.
    • Refer to the chart below to understand the tests and potential error codes.
TestDescriptionError Code on Failure
Door Lock (1)Checks door lock functionality.DC
Bleach Valve (3)Tests bleach dispenser.4C
Cold Valve (Co)Tests cold water intake.4C
Hot Valve (Ho)Tests hot water intake.4C
Spin Check (Agitation) (6)Simulates wash cycle agitation.3C
Drain Check (7)Checks water draining function.5C
Spin Check (High Speed) (8)Tests high-speed spin.3C
Door Unlock (10)Verifies door unlocking mechanism.(No code displayed.)
Samsung front-load washer test mode chart

Completion: Once complete, “OK” will appear with completion music.

Running Diagnostics on Samsung Top-Load Washers:

  1. Power On: Turn on your washer.
  2. Enter Diagnostic Mode:
    • Press the END/DELAY button repeatedly until “17” appears on the display.
    • Hold the START button for 7–10 seconds. Look for “AS” to confirm diagnostic mode.
  3. Ensure Lid Lock: Verify the lid is securely locked for diagnostics to work.
  4. Watch the test cycle:
TestDescriptionError Code on Failure
Door Lock (1)Checks door lock functionality.dC1
Cold Valve (Co)Tests cold water intake.4C
Spin Check (Agitation) (6)Tests hot water intake.4C
Drain Check (7)Simulates wash cycle agitation.3C1
Drain Check (7)Checks water draining function.5C
Spin Check (High Speed) (8)Tests high-speed spin.3C4
Door Unlock (10)Verifies door unlocking mechanism.(No code displayed.)
Samsung top-load washer test mode chart

Completion: Similar to front-load washers, “OK” will appear with some music after the tests.

Remember:

  • Consult your repair manual for model-specific instructions or features.
  • Running diagnostics can pinpoint issues for easier troubleshooting.

Additional Tips:

  • You can find detailed error code descriptions in your service manual.
  • If you encounter errors, note down the codes and refer to the manual for troubleshooting steps.

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