Dryer Keeps Shutting Off? Overheating Is Usually the Vent
A clogged or crushed vent makes the dryer overheat and shut itself off. Clear the vent, then fit semi-rigid duct to keep the air flowing.
By Jamilur Rahman Updated November 5, 2026 · 7 min read
- Time
- 1 hour
- Cost
- $20-$50
- Difficulty
- Medium
In this guide
Quick answer
If your dryer keeps shutting off, it is almost always overheating because hot, moist air cannot leave through a clogged, crushed or too-long vent. A thermostat trips to protect the dryer, and it restarts after it cools. Clean the lint screen and housing, clear the vent from the dryer to the outside, and replace any foil or vinyl accordion hose with semi-rigid aluminum duct, which holds its shape and sheds lint better. Fix the airflow and most dryers stop cutting out.
Free fix vs. permanent fix
Clear the lint and clean out the vent
- Unplug the dryer and pull it out a few inches
- Wash the lint screen and vacuum the slot
- Brush and vacuum lint out of the duct, both ends
- Clear the flap on the outside vent
How long it lasts: Months to a year if the duct is straight and short. Lint packs into a crushed or ribbed hose again quickly.
Semi-rigid aluminum duct in place of foil or vinyl hose
A crushed foil or plastic accordion hose is the usual choke point. Its ribs catch lint, and it folds behind the dryer. Semi-rigid aluminum duct holds its shape, bends in smooth curves and has a smoother inside. It is a cheap fix that removes the choke point.
What to get: Semi-rigid aluminum dryer vent duct
How long it lasts: Years. The smoother, firmer walls keep their shape, so air flows and lint does not snag.
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What you'll need
-
Screwdriver or nut driver
For the clamps on the duct
You have it -
Vacuum with a hose attachment
For the lint screen slot and the duct
You have it - Illustration
Dryer vent cleaning brush kit
Flexible rods reach lint deep in the duct
- Our pick Illustration
Semi-rigid aluminum dryer vent duct
Measure the gap first and buy the shortest length that fits
- Illustration
Dryer duct clamps and foil tape
Use clamps and foil tape, never screws, at the joints
Why it happens
A clogged duct or outside vent
Lint packs into the duct and the outside hood and traps hot air. The dryer climbs to a high temperature and its thermostat shuts it off.
A crushed, kinked or ribbed hose
Pushing the dryer tight to the wall folds a foil or vinyl hose. Even a half-flattened hose cuts airflow sharply.
A run that is too long or has too many bends
Manuals set a maximum length, and each elbow subtracts feet from it. A long, bendy run loses airflow.
A full lint screen or blocked housing
Lint screens clog with a film from softener sheets even when you empty them. If water beads on the mesh instead of soaking in, the film is blocking air.
Overloading or a failing part
A packed drum cuts airflow. A worn door switch, a failing thermostat, a blown thermal fuse or a dirty moisture sensor can also stop the cycle.
Try this first (free)
Do these in order, starting with the simplest.
-
Unplug it and let it cool
Stop the cycle, unplug the dryer and let the drum cool. If it is a gas dryer, do not kink the gas line when you pull it out. If you smell gas, leave the house and call the gas company.
-
Clean the lint screen and its slot
Tool used: Vacuum with a hose attachmentPull the screen and wash it with warm water and dish soap and a soft brush, then let it dry. Vacuum the slot the screen sits in.
-
Pull the dryer out and look at the hose
Pull the dryer out far enough to see the back. Look for a crushed hose, kinks, or low sags where lint collects.
-
Disconnect and clear the duct
Tool used: Dryer vent cleaning brush kitLoosen the clamps and take the hose off. Shake out the lint, then push a brush through the full run to the outside and vacuum what comes out.
IllustrationCheck price on AmazonTool for this step
Dryer vent cleaning brush kit · Flexible rods reach lint deep in the duct
-
Check the outside vent
Go outside and open the flap on the hood. It should swing freely when the dryer runs. Remove lint and any nests, and make sure nothing blocks the opening.
-
Replace foil or vinyl hose with semi-rigid duct
Tool used: Semi-rigid aluminum dryer vent ductMeasure the gap and cut the duct to the shortest length that connects. Secure it with clamps and foil tape, never screws, which catch lint. Push the dryer back so it does not squash the duct. Keep semi-rigid duct short and visible, not hidden in a wall.
IllustrationCheck price on AmazonTool for this step
Semi-rigid aluminum dryer vent duct · Measure the gap first and buy the shortest length that fits
When free fixes aren't enough
Cleaning clears the lint, but a crushed or ribbed hose will choke again within weeks, and foil or vinyl hose is also a fire risk. Semi-rigid aluminum duct removes the choke point and fits in under an hour. If the dryer still cuts out after the vent is clear, a part may have failed: a bad door switch, a failing thermostat, a blown thermal fuse or a worn control board. Those are repairs. For a gas dryer, or any burning smell, call a technician.
Buy the fix
Still stuck after the free fixes? These are the products we would look at.
| Pick | Product | Fixes | Who it's for | Buy |
|---|---|---|---|---|
| Best pick | Semi-rigid aluminum dryer vent duct | a crushed, ribbed or kinked hose that traps heat | Anyone with a foil or plastic accordion hose, or a dryer that cuts out and has a visibly crushed vent. | Check price |
| Budget pick | Dryer vent cleaning brush kit | lint packed in the duct and outside hood | Anyone whose duct is in good shape and who has not cleaned the run in over a year. | Check price |
Semi-rigid aluminum dryer vent duct
Fixes: a crushed, ribbed or kinked hose that traps heat
Look for: 4-inch diameter, to match the dryer outlet; Semi-rigid aluminum, never vinyl or plastic; Listed for dryer use (look for UL 2158A); Long enough for the gap with a little to spare, no more.
- Who it's for
- Anyone with a foil or plastic accordion hose, or a dryer that cuts out and has a visibly crushed vent.
- Honest downside
- Your vent run is hidden inside a wall or longer than the manual allows. Rigid metal duct is needed there, so check your manual.
Dryer vent cleaning brush kit
Fixes: lint packed in the duct and outside hood
Look for: Flexible rods that join to reach the whole run; A brush head sized for a 4-inch duct; Rods that bend around elbows without snagging; A drill adapter or hand crank.
- Who it's for
- Anyone whose duct is in good shape and who has not cleaned the run in over a year.
- Honest downside
- The duct is crushed or torn. Replace it first, since a brush can snag damaged duct.
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How we picked: How we picked: this page is based on dryer manuals, fire-safety guidance on dryer vents, duct makers' installation notes, and the problems and fixes owners report in reviews. We do not test products by hand.
How to tell if it is the vent or a failed part
- Shuts off after 10 to 20 minutes, restarts after cooling, clothes still damp: the vent is blocked.
- Stops when the door is nudged: the door switch.
- Drum runs but there is no heat: a blown thermal fuse or a failed heating element. See the related pages.
- Dead with no power at all: a tripped breaker, the plug or the fuse.
When to stop and call a pro
If you smell burning, see smoke, find scorched lint or the dryer body is very hot, unplug it and stop using it. If you smell gas from a gas dryer, leave the house and call the gas company. Call a technician for repeated breaker trips, sparks, or any gas line work.
What to skip
Plastic or foil accordion hose, and bypassing the shutoff
Vinyl and thin foil accordion hose collapse easily and are a fire risk, and many local codes ban them. Do not keep restarting the dryer or resetting a breaker, because the shutdown is a safety feature. Never bypass the thermostat.
Frequently asked questions
Why does my dryer keep stopping mid cycle or after a few minutes?
Why does my dryer keep starting and stopping?
How do I stop my dryer from stopping early?
How do I fix a dryer vent hose that is crushed or loose?
How often should I clean the dryer vent?
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