Run a Vent Blockage test on your Samsung dryer

A person checking  the Samsung dryer duct

The Vent Blockage test on your dryer automatically detects the status of the exhaust ducts and reports any blockages or problems. You should run one of these tests after the dryer is initially installed, and every once in a while after that. Clean, proper ducting can help reduce drying time and save energy as well.

Note: Not all dryer models have a Vent Blockage test. Check your user manual to confirm.

Run a Vent Blockage test

If you used your dryer prior to starting the test, it may not enter the test mode; your dryer must be sufficiently cooled down first. If you’re running the test right after installing your dryer, you can run the AIR FLUFF cycle for several minutes to reduce the internal temperature.

  1. When you're ready to start, make sure the drum is empty and then close the door. If there is any laundry in the drum, the test will not give accurate results.


  2. Press POWER to turn the dryer on and within 5 seconds, press and hold Adjust Time Up + Dry Level until InS or In appears on the display.

    Demonstration of which two buttons to press and how InS will appear on the display

    If that button combination does not work, here are other combinations you can try:

    • Cycle 1 + Wrinkle Prevent

    • Air Fluff + Wrinkle Prevent

  3. Press and hold START/PAUSE to start the Vent Blockage test which lasts for approximately 2 minutes. Do not open the door during the test.


  4. Once the test is complete, the results will be displayed:

    Result for the Vent Blockage Test:

    • If the status of the duct system is normal, "0" or "End" will display and you'll hear the completion chime.


    • If the duct system cannot exhaust properly, you will see "CLg" or "Cg" (which might look like "CL9" or "C9") on the display and hear an alarm chime. You will need to clean your dryer's exhaust vent.


    • If the door is open, "dc" will appear on the display.


    • If "C1" or "CL1" displays, see if there is laundry inside the drum. If there is, stop the test, remove the laundry, and then run the test again.

  5. The results remain on the display for about 5 minutes. Press POWER to turn off the dryer, or wait for it to turn off automatically after the 5 minutes have passed.

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