Dryer Not Drying? Here's Why (and How to Fix It)
When clothes come out damp after a full cycle, the cause is usually airflow — not a dead dryer. Here's how to troubleshoot it yourself before calling for repair.
When clothes come out damp after a full cycle, it's tempting to assume the dryer is dying. It almost never is. The real culprit is usually restricted airflow — and most of the fixes are free. A dryer works by blowing hot air through your clothes and carrying the moisture out the vent. Block that airflow anywhere along the way and the clothes stay wet no matter how long it runs.
Work through these in order before you call for service.
Start with the lint screen
The lint screen is your first and most-ignored line of defense.
- Clear it every single load. A film of lint you can barely see still chokes airflow.
- Wash it once a year. Fabric-softener sheets leave an invisible waxy residue that clogs the mesh. Scrub it with warm soapy water and a brush, then let it dry. (Quick test: pour water into a clean-looking screen — if it pools instead of running through, it's coated.)
Check the airflow outside
This single test tells you most of what you need to know. Turn the dryer on, then go outside and put your hand near the exterior vent hood.
- Strong, warm airflow → the vent is clear; the problem is heat or overloading (below).
- Weak or no airflow → the duct is clogged. This is the most common cause of a dryer that won't dry.
While you're there, make sure the vent flap actually opens and isn't blocked by a bird's nest, lint mat, or crushed ducting.
Clean the full vent duct
If airflow was weak, clear the whole run — not just the screen.
- Unplug the dryer (or shut off the gas) and pull it away from the wall.
- Disconnect the flexible duct from the back.
- Pull out the lint by hand and with a vent brush, working from both the dryer end and the outside hood.
- Don't forget the lint-trap housing — the slot the screen drops into. Lint slips past the screen and packs in there where you can't see it.
This is the job Owner Tools schedules as clean the dryer vent duct, with the deep-clean the dryer lint trap housing task as its companion. For the full walkthrough, see how to clean a dryer vent. The duct itself is the dryer vent — clean the whole thing, not just the parts you can reach.
Rule out the simple stuff
- Overloading. Cramming the drum leaves no room for air to circulate. Dry smaller loads, and don't mix heavy towels with light clothes — the towels stay wet and trick you into running another cycle.
- Wrong setting. Make sure you're not on a fluff/air-dry (no-heat) cycle, and that an auto-dry sensor isn't ending cycles early because of a clogged screen.
When it's a heat problem
If air flows freely from the vent but comes out cold, the issue is heat, not airflow — and this is where a part or a pro comes in:
- Electric dryers: a burned-out heating element or a tripped thermal fuse (often itself caused by a clogged vent overheating the dryer).
- Gas dryers: a failed igniter or gas valve coil.
A repeatedly tripping thermal fuse is the dryer telling you the vent was clogged — fix the airflow first, or the new fuse will blow too.
Why this matters beyond laundry
A dryer that struggles isn't just an inconvenience. Restricted airflow makes it run hotter and longer, spiking your energy bill and shortening the dryer's life — and trapped lint is one of the leading causes of house fires. Cleaning the vent once a year fixes all three at once. See the dryer vent system overview for the full picture.
Make it automatic
Build your free Owner Tools plan and we'll remind you to clean the lint-trap housing and the full vent duct on schedule — before drying times creep up and before lint becomes a hazard. No login, no address required.