Samsung · Dryer Serious

C80 — / C90 — Vent Blockage Detected

Samsung dryers run a vent check and report C80 (~80% blocked) or C90 (over 90% blocked). It warns the exhaust duct is clogged — an airflow and fire-safety issue.

Keep using it?
Limited use only
DIY difficulty
Easy
Verified against
samsung.com ↗

How to fix it

  1. Clean the lint filter and the filter housing.
  2. Disconnect the duct and clean it fully out to the exterior vent with a brush kit.
  3. Replace crushed flexible duct with rigid/semi-rigid duct; confirm the outside flap opens.
  4. Run the Vent Check (Smart Check) again to confirm it clears.

Why it happens

Typical signs: Clothes take multiple cycles to dry · Dryer runs hot · C80 or C90 on the display

  • Lint-clogged exhaust duct Lint has accumulated in the duct between the dryer and the outside vent.
  • Crushed or too-long vent run A kinked or excessively long duct restricts airflow.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Dryer Vent Cleaning Kit Common replacement
    Amazon →

Related repair guides

Dryer Smells Like Burning — Stop and Check This →Dryer Getting Too Hot — Causes and Fixes →Dryer Takes Too Long to Dry Clothes — Fixes →How to Clean a Dryer Vent (and Why It Matters) →

More Samsung dryer codes

3C 3C Error — Motor Error 9E1 9E1 / 9C1 — Power Supply / Voltage Error AC AC / AE — Communication Error Between Boards bE bE / bE2 — Button / Key Stuck C8 C8 — Vent ~80% Clogged (Vent Blockage Test) dC dC / dE — Door Open

All Samsung codes → All dryer codes →

Frequently asked questions

What does the C80 code mean on a Samsung dryer?

Samsung dryers run a vent check and report C80 (~80% blocked) or C90 (over 90% blocked). It warns the exhaust duct is clogged — an airflow and fire-safety issue.

What causes the C80 code on a Samsung dryer?

Lint-clogged exhaust duct: Lint has accumulated in the duct between the dryer and the outside vent. Crushed or too-long vent run: A kinked or excessively long duct restricts airflow.

Is it safe to keep using a Samsung dryer with a C80 error?

Limited use only. This is rated a serious-severity fault.

How do I fix C80 on a Samsung dryer?

Clean the lint filter and the filter housing. Disconnect the duct and clean it fully out to the exterior vent with a brush kit. Replace crushed flexible duct with rigid/semi-rigid duct; confirm the outside flap opens.

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: samsung.com.