Why a Dryer Vent Needs Regular Cleaning
Lint is fuel, and a vent full of it is a fire hazard.
A dryer moves hot, moist air out of the drum and through a duct to the outside. Lint slips past the screen and settles in the duct, especially at bends. Over time it narrows the path, so air moves slowly and heat builds up.
That has two effects. Clothes take longer to dry, which wastes energy and wears the dryer. And the dryer runs hotter, which stresses the safety parts and raises the risk of fire when lint is very dry and close to heat.
Cleaning the screen after every load helps, but it does not clear the duct. The duct needs its own scheduled cleaning.
If you smell gas near a gas dryer, leave the home and call your gas company or 911 from outside. Do not turn anything on or off.
Warning Signs Your Dryer Vent Is Clogged
Any one of these is a reason to inspect the vent soon.
Clothes take more than one cycle
A normal load that is still damp after a full cycle is the classic sign of restricted airflow.
The dryer or the laundry room feels hot
A hot dryer top or a warm, humid room means heat is not leaving the house.
A burning or musty smell
Hot lint can smell scorched. A musty smell can mean trapped moisture.
Lint around the dryer or outside
Lint puffing out around the connection or piling at the outside flap shows the duct is leaking or blocked.
The outside flap barely moves
The flap should open fully while the dryer runs. A weak flap means weak airflow.
The dryer shuts off mid cycle
A safety thermostat may be cutting off the heat or the whole cycle.
How to Clean a Dryer Vent Safely: Seven Steps
Plan about an hour. Work slowly and wear a dust mask.
Power down
Unplug an electric dryer. For a gas dryer, close the gas shutoff valve and unplug the cord.
Pull the dryer out carefully
Move it just far enough to reach the back. Do not strain a gas line or pull on the connection.
Disconnect the vent hose
Loosen the clamp at the dryer and at the wall, then pull the hose off. Take it outside and shake it out. Replace it if it is crushed or torn.
Clean the duct
Use the vent brush on the wall duct, working in sections. Vacuum as you go. Keep brushing until little lint comes out.
Clean the outside end
Go outside, open the flap, and clear lint from the opening and the flap. Make sure the flap moves freely.
Clean the lint trap housing
Remove the lint screen and vacuum the slot below it. Wash the screen with soapy water and let it dry.
Reconnect and test
Reattach the hose with clamps or foil tape, restore power or gas, and run a short cycle. Check the outside flap while it runs.
What you need
- A vent brush kit with flexible rods
- A vacuum with a hose attachment
- A screwdriver or nut driver
- Foil tape for reconnecting the duct
- A dust mask and gloves
How Often to Clean a Dryer Vent
Use the schedule that matches your household.
| Situation | Suggested schedule |
|---|---|
| Every load | Clean the lint screen |
| Typical household | Clean the duct at least once a year |
| Large family or heavy laundry | Clean the duct every six months |
| Pets that shed | Clean more often and check the screen mid load |
| Long or complicated duct | Have it cleaned by a professional on a regular schedule |
Dryer Vent Cleaning: Do It Yourself or Call a Professional
Reasonable to do yourself
- A short, straight duct that is easy to reach
- Cleaning the lint screen and trap housing
- Replacing a crushed or torn vent hose
- Clearing the outside flap
- Regular yearly maintenance
Call a professional
- A long duct or one with many bends
- A duct that runs through a roof or a wall you cannot reach
- Any gas line or connector work
- Signs of scorching or melted parts
- A dryer that keeps overheating after cleaning
What We See on Dryer Calls Involving Vents
Many calls for a dryer that is not heating end with a vent problem. The heating element may be fine, but a thermal fuse or thermostat has tripped because the airflow was blocked.
We check the vent on every dryer visit and tell you what we find. If a part failed because of the vent, we replace it and explain how to avoid a repeat. If you would like to see how the dryer is diagnosed, read our guide on a dryer that is not heating.
Habits That Keep a Dryer Vent Clear Longer
Use a short, straight, rigid or semi rigid metal duct where you can. Long, flexible foil or plastic ducts trap more lint. Keep the duct away from kinks and sharp bends.
Never run the dryer without the lint screen, and do not dry items that have been soaked in flammable products. Keep the area around the dryer clear of clutter.
Dryer Overheating or Not Heating? Call Now
If cleaning the vent did not fix the problem, a technician can test the heating parts and the safety devices.
Tell us what the dryer does and we will offer the first opening.
Clean a Dryer Vent FAQs: Quick Answers Before You Call
Short answers to the questions we hear most. If yours is missing, call and ask.
How often should I clean my dryer vent?
At least once a year for a typical household, and more often for heavy use, pets, or a long duct. Clean the lint screen after every load.
What are the signs of a clogged dryer vent?
Long dry times, a hot dryer or laundry room, a burning smell, lint around the vent, and a weak outside flap.
Can I clean a dryer vent myself?
Often yes, if the duct is short and easy to reach. Use a vent brush kit and a vacuum. For long or complicated ducts, a professional is the safer choice.
Is it safe to move a gas dryer?
Only carefully. Close the gas valve first, and do not pull on the gas connection. If you are unsure, have a technician do it.
Can a clogged vent cause the dryer to stop heating?
Yes. Overheating can trip the safety parts. See our guide to a dryer that is not heating.
What type of duct is best?
A short, smooth walled metal duct moves air best and collects less lint than flexible foil or plastic.
