How to Enter Diagnostic Mode on Samsung Dryers

Samsung dryers have a built-in self-diagnostic mode that allows you to troubleshoot issues before calling for service. Accessing diagnostic mode displays any error codes stored in the dryer’s memory and runs tests to check various components like sensors, heating elements, and motors.

Entering diagnostic mode is quite simple on most Samsung dryers with just a few button presses. Here is a step-by-step walkthrough on how to activate the diagnostic mode and use it to diagnose dryer problems:

How to Enter Diagnostic Mode on Samsung Dryers

How to Run Diagnostic Mode – A Step-by-Step Guide

Before you begin, there are a few things to confirm on your Samsung dryer:

  • Your Samsung dryer must have electronic touchpad controls. Older models with dial/knob controls do not have diagnostic mode.
  • Check your user manual and model number to verify that diagnostic mode is supported. Some lower-end models may lack this feature.
  • The diagnostic mode only operates when the dryer is powered on but not running a cycle. You cannot activate it mid-cycle.
  • No loads should be inside the dryer. Remove all clothing items before diagnosing.

Step 1 – Power On the Dryer

The first step is to turn on your Samsung dryer using the power button. Keep the dryer door open, as diagnostic mode will not start with the door closed.

Step 2 – Locate the Diagnostic Mode Buttons

You must press a combination of two buttons to enter diagnostic mode. The exact buttons vary between different Samsung models:

  • Press temp and time simultaneously for dryers with temp and time buttons.
  • If there is a dedicated temp button but no time button, press temp and start/pause together.
  • On models without a temp button, press power and start/pause.

Check your manual for the right button combination for your specific model. The buttons are always clearly labeled on the touch control panel.

Step 3 – Hold Buttons for 5 Seconds

Once you locate the correct button pair for activating diagnostic mode, press and hold both buttons together for 5 seconds.

Keep holding until you see the display change. The buttons must be held down continuously for 5 seconds. Do not repeatedly press the buttons.

Step 4 – Display Enters Diagnostic Mode

After 5 seconds, the dryer will enter diagnostic mode. You will immediately see all the indicator lights on the display illuminate.

The display will then cycle through a test sequence where each light turns on for a few seconds and then off. When complete, a numeric error code may display if any are stored.

Step 5 – Test Component Parts

In diagnostic mode, you can initiate manual tests of the different internal parts of the Samsung dryer. Here are the key components that can be tested:

  • Heating Coil – Press the temp button once to turn on the heating coil. Check that it heats up within a few minutes.
  • Moisture Sensor – Place a wet paper towel inside the drum. Press the temp button twice. The sensing bars should activate on the display.
  • Motor – Press the time button. The drum should rotate clockwise and then counterclockwise.
  • Door Switch – Press the time button twice. Listen for a clicking noise indicating the door switch is functional.
  • Drum Light – Press time three times. The drum light should turn on if your model is equipped with one.

Step 6 – Read Error Codes

A major benefit of diagnostic mode is getting error codes without running a full cycle. Any current error will flash on the display during and after the initial test sequence:

– tE1, tE2 = Thermistor sensor failure

– LE1, LE2 = Heating coil failure

– nP = Electric power issue

– PS = Power cord signal disconnected

– Eb = Main PCB failure

Refer to the owner’s manual for other possible error code meanings. Write down any codes before exiting diagnostic mode.

Step 7 – Exit Diagnostic Mode

After running tests and checking codes, you must completely power off the Samsung dryer to exit diagnostic mode.

Press and hold the power button for several seconds until the display shuts off. The diagnostic mode will reset once the dryer is powered back on.

Also Read:

Samsung Washer Not Spinning Clothes Dry: Troubleshooting

Samsung Top Load Washer That Won’t Start: Troubleshooting

Using Diagnostic Mode to Troubleshoot Samsung Dryer Issues

Now that you know how to activate it on your Samsung dryer, here are tips for utilizing diagnostic mode to pinpoint and resolve common drying problems:

Troubleshooting No Heat Problems

If your Samsung dryer is not heating, first check for tE and LE error codes indicating a faulty thermistor or heating coil. You can verify the heating coil manually turns on when you press the temp button.

If the coil fails to heat up, test it for continuity and replace it if defective. If the coil heats up, the thermistors likely need to be replaced. Thermistors regulate temperature.

Troubleshooting Noise Issues

Unusual noises from the drum, blower wheel, or motor can be analyzed in diagnostic mode. Run each component test and listen closely for any abnormal sounds. Take a video of the noise if possible.

Ker-thunk noises point to a stuck motor or bad drum rollers. Squealing or squeaking indicates faulty bearings. Grinding suggests motor issues or blower wheel damage.

Troubleshooting Moisture Sensor Problems

When moisture sensors malfunction, clothes take excessively long to dry. Check for sensor test errors or clothing remaining too damp after a cycle.

Run the moisture sensor test using a wet paper towel. If the bars don’t activate, replace the sensor bars. Confirm bars are clean.

Troubleshooting Thermostat Issues

If the dryer runs hot, the thermostats that regulate temperature may be defective. The heating coil diagnostics tests thermostats.

Thermostats are cheap to replace. A burnt or damaged high-limit thermostat indicates the heating coil overheated, requiring coil replacement, too.

Troubleshooting Control Board Failure

The main control board likely fails if the display is completely dead, won’t start cycles, or shows Eb errors. Control boards may require professional diagnosis and repair.

Replacing the user interface board first is worth trying as it governs the display and buttons before replacing the central control board.

Best Practices When Using Diagnostic Mode

Follow these tips to get the most benefit from Samsung dryer diagnostic mode:

– Carefully listen and watch component tests for abnormal performance.

– Compare error codes against the owner’s manual for your specific model. Code meanings can vary.

– Reset diagnostic mode completely between tests. Power on/off before re-testing.

– Don’t start diagnostic mode with wet loads inside. Water can damage sensors.

– Another underlying issue may exist if error codes persist after component replacement.

– Still not sure of the cause? Contact a Samsung-authorized repair technician for assistance.

The diagnostic mode takes the guesswork out of identifying defective parts on a Samsung dryer. By accessing built-in tests and error codes, you can isolate and confirm problems before attempting do-it-yourself repairs. This prevents wasted effort and money on parts your dryer may not actually need.

Frequently Asked Questions

What are the benefits of the Samsung dryer diagnostic mode?

Diagnostic mode displays error codes allows component tests, and assists with troubleshooting issues related to sensors, heating, motors, and control boards. This helps pinpoint faulty parts.

Does diagnostic mode work on all Samsung dryers?

No, it only works on newer Samsung dryers with electronic touchpad controls. Check your model number and user manual to confirm your dryer supports diagnostic mode.

What buttons do I press to enter diagnostic mode?

Buttons vary by model, but common combinations are temp + time, temp + start/pause, or power + start/pause. Hold the buttons for 5 seconds until the display changes.

Can I run diagnostic mode with wet clothes in the dryer?

Do not run diagnostics with wet loads. The moisture can damage sensors during testing. Always remove all clothing items first.

How can I exit Samsung dryer diagnostic mode?

To exit, press and hold the power button until the dryer fully shuts down. When powered back on, it will no longer be in diagnostic mode.

Why does my Samsung dryer show error codes?

Error codes indicate specific component failures detected by the dryer’s computer diagnostics. Check the owner’s manual to identify the particular part that needs replacement.

Do Samsung dryer error codes clear on their own?

No, error codes do not clear automatically. You must enter diagnostic mode, view any codes, and then power cycle the dryer completely to reset them.

What should I do if diagnostic tests fail?

If a component test like the heating coil fails, that points to a defective part needing replacement. Contact Samsung support or an authorized technician for help.

Why is my Samsung dryer making a loud noise?

Loud noises during diagnostic testing can indicate problems with the motor, drum rollers, blower wheel, or bearings. The specific sound heard helps identify the issue.

How can I fix my Samsung dryer if the diagnostic mode doesn’t reveal the problem?

For elusive issues not diagnosed through error codes or testing, contact Samsung support or find a reputable appliance repair company to troubleshoot further.


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