Error Code C9
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 buildup in vent ductwork; Severely crushed or kinked exhaust duct; Duct too long or has too many bends; Completely clogged lint filter or external hood
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 duct
- 3
3. Check for crushed, kinked, or compressed duct sections — replace if damaged
- 4
4. Ensure duct is 4-inch rigid metal and as short/straight as possible
- 5
5. Clean the external exhaust hood and ensure it opens and closes freely
- 6
6. Re-run the Vent Blockage Test to confirm resolution
Other Error Codes for DVE45A6400C
Your dryer is getting the wrong voltage from the outlet
A secondary temperature sensor is giving bad readings
Your dryer is getting the wrong type of electrical power
Your dryer's temperature sensor isn't reading correctly
A button on the control panel is stuck or shorted
Your dryer isn't heating properly or is overheating
The door switch isn't working properly
Your dryer detected restricted airflow during a vent test