Quick answer
A clogged dryer vent shows up as clothes needing two or more cycles, the dryer and laundry room getting unusually hot, lint around the outside flap or behind the dryer, the outside flap barely opening when the dryer runs, or a burning smell. Lint buildup restricts airflow and is a fire risk; the U.S. Fire Administration names failure to clean as the leading cause of home dryer fires. Clean the lint screen every load, disconnect and clean the duct, and check the outside flap opens freely. Call (888) 217-0236 to reach an appliance repair company taking calls in your ZIP; the line is answered 24/7.
Follow the short menu, then your 5-digit ZIP. The line goes quiet for a few seconds while it connects; stay on. If it does not connect, call once more: companies taking calls change minute to minute.
Written & reviewed by Marcus ReedIICRC WRT
Reviewed November 4, 2026· Next review May 2027
A dryer pushes hot, damp air out through a duct to the outside. When lint builds up in that duct, the air slows down, clothes take longer to dry, and the dryer runs hotter than it should.
Signs to Watch For
| Sign | Why it happens |
|---|---|
| Clothes need two or more cycles | Moist air cannot leave |
| Dryer top or laundry room very hot | Heat is trapped |
| Outside flap barely opens | Weak airflow |
| Lint around the outside vent or behind the dryer | Duct clogged or disconnected |
| Burning smell | Lint near the heat source; stop and check |
| Dryer stops heating | Thermal fuse tripped from overheating |
Why It Matters
The U.S. Fire Administration counts thousands of home clothes dryer fires each year and names failure to clean as the leading cause. Lint is highly flammable, and restricted airflow raises the temperature around it.
Check and Clean It
- 1Feel the airflow outside with the dryer running. It should be strong and warm.
- 2Unplug the dryer and pull it out. On gas dryers, take care not to strain the gas line.
- 3Disconnect the duct and clean it with a dryer vent brush through the full run, to the outside.
- 4Clear the outside flap of lint, nests and debris so it opens freely.
- 5Replace foil or plastic duct with rigid or semi-rigid metal, kept short with few bends.
Talk to an appliance repair technician
One call reaches an appliance repair company taking calls in your ZIP, answered 24/7.
After a Clog
If the dryer stopped heating, the thermal fuse may have blown from overheating, and it will blow again if the vent is still restricted. See dryer not heating and dryer stops after a few minutes.
What a Repair Costs
Angi puts typical dryer repairs at $100–$430. A thermal fuse is at the low end. See dryer repair.
The Call
Call when the vent is clear and the dryer still overheats, will not heat, or smells of burning. (888) 217-0236 is answered 24/7 and connects you to an appliance repair company taking calls in your ZIP for washers, dryers, ovens, stoves, cooktops and freezers. Follow the short menu, enter your 5-digit ZIP and stay on while it connects; if it does not connect, call once more.
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Frequently Asked Questions
How do I know if my dryer vent is clogged?
Clothes take longer to dry, the dryer is hot to the touch, the outside flap barely opens, lint collects around the vent, or you smell burning.
How often should a dryer vent be cleaned?
Many safety groups and manufacturers suggest at least once a year, and the lint screen every load. Long runs and heavy use need it more often.
Can a clogged vent damage the dryer?
YesRestricted airflow makes the dryer overheat, which can trip the thermal fuse or high-limit thermostat, so the dryer stops heating.
Sources
Methodology: How we source and verify data · Report an error
Disclaimer: HearthDry is an independent educational resource. This article is for informational purposes only and does not constitute professional, legal, or insurance advice. Consult licensed professionals before making decisions about your property or insurance claims.
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