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Source-backed error-code guide

Reviewed

Samsung Dryer Clg / Cl9 / Cg / C9 / C80 / C8o / C8 / C90 / C9o / Ct Error Code

The exact display controls the meaning. Samsung defines Clg or Cg as clogged, C80 or C8 as about 80% clogged, C90 or C9 as over 90% clogged, and Ct as a temperature condition rather than a blockage percentage.

Applies to Samsung dryer with vent blockage test

What the appliance detected

Detected condition

The dryer reported a Vent Blockage test result; some listed results indicate vent restriction, while Ct indicates that the dryer temperature is outside the test range.

What may contribute

Possible causes

  • Clg or Cg indicates that the vent is clogged.
  • C80 or C8 indicates that about 80% of the vent is clogged.
  • C90 or C9 indicates that over 90% of the vent is clogged.
  • Ct indicates that the dryer is below freezing or above 104°F during the test.
  • Samsung lists Cl9, C8o, and C9o in this result family but does not separately define those visual variants in the reviewed page text.

Start conservatively

Safe preliminary checks

Work in order and stop whenever a step is not supported by the documentation for your model.

  1. Record the exact result and model

    • Photograph or write down the exact display, preserving the difference between letters and numbers such as C80 and C8o or C90 and C9o.
    • Confirm the full model number and owner manual before interpreting an unclear visual variant or considering another test.

  2. Treat mapped blockage results as a stop condition

    • For Clg, Cg, C80, C8, C90, or C9, stop using the dryer until the lint filter and exhaust vent have been addressed.
    • With the dryer off and cool, clean the removable lint filter according to the model documentation.

  3. Use a professional for the exhaust path

    • With the dryer off, visually inspect only accessible external venting for crushing, kinks, or an obvious blockage.
    • Use a qualified dryer-vent cleaning professional for hidden, inaccessible, or blocked ductwork. Do not operate the dryer to test a suspected blockage.

  4. Handle Ct as a separate temperature result

    • For Ct, Samsung says the dryer is below freezing or above 104°F. Wait one hour with the dryer at room temperature, then retry only as the exact model manual directs.
    • If Ct continues, or if Cl9, C8o, or C9o is not clearly explained by the exact model documentation, request Samsung support or service rather than guessing.

Actions not recommended

  • Do not operate a dryer with a mapped blockage result or suspected blocked vent, and do not rely on a reset because Samsung says resetting cannot clear a vent.
  • Do not improvise a Vent Blockage test sequence, open panels, disassemble the dryer, reach into hidden ductwork, or remove internal components.
  • Do not disconnect, loosen, test, or repair gas lines or open electrical connections while investigating a test result.

When to stop and request service

  • Use a qualified dryer-vent cleaning professional for a mapped blockage result or any inaccessible exhaust restriction.
  • Request Samsung support or appliance service if Ct continues after the documented room-temperature wait or an exact listed visual variant remains unclear in the model documentation.
  • Stop immediately and seek qualified help for smoke, burning odor, scorching, sparking, unusual heat, a gas odor, or visible damage.

Documented source

Official information reviewed

Our summary is based on manufacturer support material and stays within the limits of that material.

Source reviewed by Appliance Help HQ: August 12, 2026.

Appliance Help HQ is an independent informational site and is not affiliated with or endorsed by Samsung.

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