1. Home
  2. /
  3. Run a Dryer Vent Blockage Test

Run a Dryer Vent Blockage Test

Washer and dryer with doors open

The Vent Blockage test automatically detects the status of the exhaust ducts and reports any blockage or problems. This is great because proper ducting can reduce drying time and save energy.

Not all dryer models have a Vent Blockage test. To confirm if your model has a Vent Blockage test, and the steps to perform it, view the user's manual for your model.

Run a Vent Blockage Test

  1. 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.

    Other button combinations:

    • 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" is displayed and you'll hear the completion chime.  

    • If the duct system cannot exhaust properly, you will see "CLg" or "Cg" on the display and hear an alarm chime.  

  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.

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

Was this content helpful?

151 people found this helpful.

How would you like to contact us?

Give us a call 1-800-SAMSUNG (1-800-726-7864)
MOBILE: 24 HOURS, 7 DAYS A WEEK ALL OTHER: M-F 8-12AM/S-S 9AM-11PM, APPLIANCES 6PM ET Printer support visit: hp.com/support/samsung

Chat with us

Live Chat support with a Samsung Care Pro.


Help with your order

Send us your inquiry and we will respond within 24 hours.

Social Support

Contact us on Twitter or Facebook and we'll reply with an answer to your question or issue.

Ask the Community

Browse answers, ask questions and get solutions from other Samsung customers.

Question about a promotion?

Learn more about Samsung promotions.