Error Code C9
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
Vent ductwork significantly clogged; Vent ductwork too long or excessively bent; Outside exhaust hood damper stuck
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. Check duct connections and shorten or straighten the duct if necessary
- 2
2. Ensure duct connections are not clogged
- 3
3. Ensure outside exhaust hood opens freely
- 4
4. Redo the Smart Install test after correcting vent issues
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 over 90% blocked — needs immediate cleaning
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