Error Code C9/C90
Your dryer vent is over 90% blocked — needs immediate cleaning
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: C9 or C90
What This Means
Severe lint accumulation in exhaust duct; Fully blocked exhaust hood; Crushed or disconnected ductwork
What actually causes this:
Severe lint buildup in the exhaust vent is almost completely blocking airflow. This is a fire hazard.
First Thing to Check
Stop using the dryer and check the exhaust vent immediately for heavy lint buildup.
Parts Involved
How to Fix
- 1
1. Clean the lint filter thoroughly
- 2
2. Disconnect and thoroughly clean the entire exhaust vent ductwork
- 3
3. Check external exhaust hood for full blockage
- 4
4. Inspect ductwork for crushing or disconnection
- 5
5. Re-run Smart Install vent blockage test to verify correction
This Error Applies To
Samsung DV54CG7 Series Dryers (2024) (2024–present)
Related Error Codes
The dryer thinks the door is open while running
Your dryer is getting the wrong type of electrical power
The dryer's internal parts aren't communicating properly
Your dryer is getting the wrong voltage from the outlet
Your dryer isn't heating properly or is overheating
Your dryer's temperature sensor isn't reading correctly
A button on the control panel is stuck or shorted
The door switch isn't working properly