Why does a clogged dryer vent matter?

A clogged vent traps hot, moist air. The dryer runs longer, uses more energy, and can overheat—tripping the thermal fuse or increasing fire risk. Lint is highly flammable; buildup in the vent is a leading cause of dryer fires.

How often should I clean my dryer vent?

Clean the lint screen after every load. Inspect and clean the vent hose and duct at least once a year, or more often if you dry many loads, have a long vent run, or notice slow drying.

When should I call a pro for dryer vent cleaning?

Call a professional if the vent is long (over 25 feet), uses rigid metal duct, vents through the roof, or the exterior cap is unreachable from the ground. Pros have specialized brushes and vacuums for long or complex runs.

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Fix a dryer vent that is clogged

We'll confirm the vent is clogged, clean the lint screen, vent hose, wall duct, and exterior cap, then verify airflow—or tell you when to call a pro.

Category: Troubleshooting · Home appliances
Time: 15–30 min
Last reviewed: Mar 6, 2026

What you'll need

Vent brush (flexible, extends into duct)
Vacuum with hose attachment
Screwdriver (if vent cap has screws)
Trash bag (for lint)

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Quick triage — pick your path

Get started

Choose the option that matches what you see. You can jump straight to that section.

Follow this guide Work through the full procedure from confirming the symptom to cleaning each section.
Clean lint screen and hose You want to start with the easiest steps—lint screen and vent hose.
Clean wall duct and exterior The lint screen and hose are clear; you need to clean the duct and exterior cap.
When to call a pro The vent is long, rigid, vents through the roof, or you cannot reach the exterior.

Show full guide

Steps

Goal: Confirm the vent is clogged, clean each section, and verify airflow.

Run a timed dry cycle. Check that clothes take longer than usual to dry, the dryer exterior feels hot, or you feel weak airflow at the exterior vent cap.
Good: Symptom matches a clogged vent. Proceed to Clean lint screen and hose.
Bad: Different problem—dryer not heating or drum not turning. See Fix a dryer that will not heat or Fix a dryer that will not tumble.

Clean lint screen and hose

Goal: Clean the lint screen and vent hose—the most common blockage points.

Pull the lint screen from inside the drum. Remove all lint and wipe with a damp cloth if needed. Confirm the screen is clean and slides back in.
Unplug the dryer and pull it away from the wall. Disconnect the vent hose from the dryer exhaust port and the wall duct.
Inspect the hose for lint buildup, kinks, or tears. Clean with a vacuum or vent brush. Shake out lint over a trash bag. Reconnect and tighten the clamp.
Good: Lint screen and hose are clear. Proceed to Clean wall duct and exterior.
Bad: Hose is severely damaged—replace with a rigid or semi-rigid metal hose before reconnecting.

Clean wall duct and exterior

Goal: Clear the wall duct and exterior vent cap.

Insert a vent brush into the wall duct from the dryer side. Push and pull several times to dislodge lint.
Go outside and locate the vent cap. Remove the cap if it has screws. Clean lint from the cap, duct opening, and damper. Reinstall the cap.
Good: Duct and cap are clean. Proceed to Verification.
Bad: Vent is long (over 25 feet), rigid metal, or vents through the roof—call a professional. Never work on roof vents yourself.

When to get help

Call a professional vent cleaner if:

The vent run is long (over 25 feet).
The duct is rigid metal and you cannot clear it with a brush.
The vent exits through the roof (fall risk—do not attempt yourself).
The exterior vent cap is unreachable from the ground.
You have cleaned the accessible parts and airflow is still weak.

Verification

The lint screen is clean and the vent hose is reconnected with no kinks.
Strong, warm airflow at the exterior vent cap when the dryer runs.
Clothes dry in normal time for the load size.
No hot dryer exterior or burning smell during a cycle.

Escalation ladder

Work from the device outward. Stop when the problem is fixed.

Confirm symptom Verify slow drying, weak airflow, or hot dryer exterior; rule out a different problem.
Lint screen and hose Clean the lint screen and vent hose; reconnect and test.
Wall duct and exterior Clean the wall duct with a vent brush; clean the exterior vent cap.
Verify airflow Run a cycle and confirm strong airflow at the exterior vent.
Call a pro Long vent, rigid duct, roof vent, or unreachable exterior—call a professional vent cleaner.

What to capture if you need help

Before calling support or posting for help, have these ready. It speeds everything up.

Whether the lint screen was full
Whether the vent hose had lint buildup or damage
Whether the wall duct or exterior cap was blocked
Vent length and type (flexible vs rigid)
Steps already tried

Is drying slow, airflow weak, or the dryer exterior hot?

Run a timed dry cycle. Check drying time, feel the exterior vent, and check the exterior vent cap for airflow.

Run a timed dry cycle. If clothes take longer than usual to dry, the dryer feels hot outside, or you feel weak airflow at the exterior vent, the vent is likely clogged. Good: symptom matches—proceed to clean. Bad: different problem (dryer not heating, drum not turning)—see Fix a dryer that will not heat or Fix a dryer that will not tumble.

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