What to check, in order
- Clean the lint filter
Samsung says before or after every load. Don't run the dryer without it, or with a damaged one.
- Clean the exhaust vent
Turn off the gas if it's a gas dryer, and unplug it. Take off the outside vent cover, undo the clamp on the duct behind the dryer, then brush and vacuum the lint out of the duct. Samsung recommends a professional vent cleaning service.
- Check the duct itself
It shouldn't be plastic or foil, kinked or squashed. Every 90° bend cuts the maximum length your manual allows by 6 feet (1.8 m). Replace a damaged duct.
- Run the test again
Drum empty, door closed. Press Power, then within 5 seconds press and hold Adjust Time Up and Dry Level (or Cycle 1 and Wrinkle Prevent, or Air Fluff and Wrinkle Prevent) until In or InS appears. Press and hold Start/Pause. It takes about 2 minutes, and 0 or End means the duct is clear.
When to call an engineer
Samsung recommends a professional vent cleaning service. If the test is clear and the dryer still has no heat, request Samsung service.
Good to know
- Other test results: Ct means the dryer is too cold (below freezing) or above 104°F (40°C) to run the test. C1 or CL1 means there's laundry in the drum, and dC means the door is open.
- Samsung says to clean the exhaust vent once or twice a year even when nothing seems wrong.
Parts people end up buying
Only if the checks above point to a part. Match it to your model number first: it's on a label inside the door, around the door frame or on the back.
- Dryer vent cleaning kitSearch on Amazon
- Rigid dryer vent ductSearch on Amazon
Affiliate links: as an Amazon Associate I earn from qualifying purchases, at no extra cost to you. It never changes a verdict.
Quick answers
What does the Samsung CLg error code mean?
These are results of Samsung's Vent Blockage test: the duct can't carry the exhaust away properly. C80 or C8 means about 80% blocked, and C90 or C9 about 90%.
Can I fix Samsung CLg myself?
Easy (30 to 60 minutes). Start with: clean the lint filter; clean the exhaust vent; check the duct itself. Samsung recommends a professional vent cleaning service. If the test is clear and the dryer still has no heat, request Samsung service.
Is Samsung CLg worth repairing?
Deal with it now. Lint in a blocked duct is a fire risk, not just the reason clothes take longer to dry.
Checked against
- Samsung US: run a Vent Blockage test on your dryer
- Samsung US: how to clean your dryer
- Samsung US: clothes not dry after a dryer cycle
- Samsung Canada: dryer error codes
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.