Error Code C9/C90
Your dryer vent is over 90% blocked — needs immediate cleaning
Moderate
Address soon - your appliance may not work properly
Also displayed as: C9 or C90
What This Means
Duct is severely restricted or blocked; Duct too long with excessive bends; Crushed or kinked flexible duct
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. Inspect full length of exhaust duct for blockages
- 2
2. Check duct connections and ensure they are not clogged
- 3
3. Shorten or straighten the duct if necessary
- 4
4. Replace crushed or kinked sections
Parts Commonly Needed for This Error
OEM part numbers confirmed by retailers
This Error Applies To
Samsung DVE45R6300 Series Dryers (2024) (2024–present)
Related Error Codes
The dryer thinks the door is open while running
Your dryer detected restricted airflow during a vent test
Your dryer is getting the wrong voltage from the outlet
The dryer's internal parts aren't communicating properly
Your dryer vent is about 80% blocked
Your dryer vent test passed — airflow is good
The vent blockage test found a problem with your exhaust
A button on the control panel is stuck or shorted