How to Clean Dryer Duct From the Trap to the Outside

Give the whole exhaust path attention

If loads are taking longer even though you clear the screen, lint may be collecting farther along the exhaust path. We'd begin with the screen and trap after shutting down the dryer, because a blocked screen slows drying and a clean trap supports airflow, then continue through the duct.

Other clues include clothes that come out extra hot, moisture or lint collecting indoors, and a slight charred smell without an obvious source. Lint and dust in the vent can restrict airflow, lengthen drying times and cause overheating, so those changes deserve attention.

This procedure is for dryers that exhaust outdoors. Ventless or condensing dryers don't use that exterior exhaust path. Follow your model's instructions for access and maintenance, and use cleaning equipment according to its manufacturer instructions and applicable local rules.

Get your tools and shut down safely

Gather a dryer vent cleaning brush or kit and a vacuum with a hose attachment. A crevice attachment helps with the lint trap, and you may need a screwdriver for the vent clamps. Brush kits with additional handle sections let you extend your reach into the wall duct.

Turn off and unplug the dryer before cleaning or adjusting the vent, so it can't operate while parts are disconnected. Whirlpool's shutdown instructions (opens in a new tab) and Maytag's guidance put unplugging before the work begins. PNNL lists moving the dryer before unplugging it; we'd follow the manufacturers' earlier shutdown because it prevents accidental operation during the work.

Before moving anything, identify the hose or duct at the back of the dryer and locate the exhaust outlet outdoors. That gives you both ends of the cleaning job and lets you assess the access you'll need.

Clear the screen and the trap beneath it

The removable screen and the space it fits into need separate attention. For routine screen cleaning, gently lift off lint by hand. Don't scrub the screen or use water for this operation, because wet lint is harder to remove.

Whirlpool's lint-trap cleaning procedure (opens in a new tab) works through the accessible trap with the screen out. Use your model's instructions to locate and remove the screen, which is commonly near the door.

1. Remove the screen, clear its lint by hand and set it aside so the trap opening is exposed.
2. Vacuum the inside and outside of the lint trap with a crevice tool or brush attachment, collecting the lint around the opening.
3. If your dryer has moisture sensor strips on the outside of the lint trap, vacuum those strips too, then put the screen back in place.

Make room and detach the hose

With the shutdown preparation complete, ask another person to help you carefully move the dryer about one foot away from the wall. That creates working space for clearing debris while helping protect you and the appliance.

Unscrew the clamps or remove the attachment tape holding the vent to the back of the dryer. Detach the hose at the wall connection as well, using a screwdriver where the clamps require it. You should now have access to the dryer-side hose and the duct opening in the wall.

The Maytag vent-cleaning procedure (opens in a new tab) includes cleaning the back of the dryer and inside the detached hose. Include both when you work through this part of the exhaust path.

Brush and vacuum through the duct

Start by lifting out large pieces of lint with your hands. Then use the dryer cleaning brush to loosen what's left, followed by the vacuum hose to collect lint and dust in crevices. The brush loosens the buildup so the vacuum can remove it.

Work gently around the back of the dryer and through the hose, following its turns with the brush. Maytag calls for a dryer-kit brush or a similarly sized cleaning brush, with a vacuum hose for debris that's harder to reach.

For the dryer-side duct, PNNL's brush-and-vacuum method (opens in a new tab) calls for inserting the brush and rotating it as you go. Open the dryer door, then vacuum out the duct as you withdraw the brush.

Next, insert the brush into the exhaust duct that enters the wall. Add handle sections as needed, rotate the brush according to the cleaning-kit instructions and vacuum up the loosened lint. Some kits support powered rotation, but use a drill or electric screwdriver only as directed for your kit.

Finish at the outdoor outlet

At the outdoor end, check that the outlet is unobstructed and its flap or louvers open. The exhaust must terminate outdoors, not in an attic or crawlspace. PNNL's outlet guidance (opens in a new tab) calls for a single-flap or louvered cap without screening.

Where the exterior end is accessible, open or remove the vent cover and lift out large lint clumps by hand. Repeat the brushing and vacuuming from this end, clearing the ductwork of debris. This reaches the outdoor portion of the same exhaust path you've been cleaning inside.

Put the exterior cover back after cleaning, including a louver cover you've removed for access. Leave the outlet clear and the flaps able to open.

Reconnect without squeezing the duct

Clean up loose lint around the dryer before reconnecting it. Secure the vent between the wall and the back of the dryer, reattaching its clamps or attachment tape as applicable. Complete those connections before plugging the dryer back in.

Get another person's help to slide the appliance gently back into place. Don't crush the duct behind it, and position the hose as short and direct as possible. Excessive length and bends can restrict airflow and encourage lint buildup.

Rigid and semirigid metal ducts are less likely to kink or crush, but they're also less maneuverable when aligning the dryer and wall connections. If your existing setup has a corrugated or accordion-style hose, align the dryer so the hose sits compactly and directly without crushing it. Follow your model's requirements for the existing connection.

Once reassembly, supply restoration and repositioning are complete, run an empty cycle. Whirlpool specifies 10 to 15 minutes (opens in a new tab) to remove excess dust; Maytag specifies roughly 15 minutes (opens in a new tab) to clear residual debris.

The practical checks are cleared ductwork, an unobstructed outlet with opening flaps, secure connections and an uncrushed hose. Cleaning can restore airflow and improve drying, but the empty cycle alone isn't proof that a drying problem is resolved. Pay attention to how subsequent loads dry.

Set separate reminders for screen and duct

Clean the lint screen after every use. Its maintenance schedule is separate from the larger duct-cleaning job, because lint on the screen itself can increase drying time.

The duct-cleaning intervals differ. PNNL recommends annual cleaning (opens in a new tab). Whirlpool recommends at least once every two years (opens in a new tab), unless your owner's manual instructs otherwise, and more often when the dryer starts struggling with loads.

Maytag also gives an at-least-every-two-years interval, with timing affected by dryer use and clogging. Set your reminder around your model's requirements, and respond to worsening drying performance before that reminder comes due.

Get help when access stops the job

If you can't move the dryer, Maytag allows cleaning from an accessible exterior wall outlet, but still calls for interior cleaning too. Have a service professional complete the interior work when you can't access it yourself. Outside-only access doesn't finish the whole job.

For maintenance concerns, inaccessible portions of the run or drying trouble that continues after cleaning, contact an appliance service professional. If you own a Maytag, its dryer vent guide describes professional service as an alternative (opens in a new tab).

When requesting help, describe the drying symptoms and which parts you've already cleaned: the trap, rear hose, wall duct or outdoor outlet. Point out any part you couldn't reach so the remaining interior and exterior work is clear.