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Health & Safety Bi-Annual

How to Deep Clean a Dryer Vent

Cleaning the entire exhaust duct from the back of the dryer all the way to the outside of the house is the most important fire-prevention task you can do.

Time Required 45 mins
Difficulty Moderate
DIY Skill Level 2

Why It Matters

Clogged dryer vents are one of the leading causes of house fires. Lint buildup restricts airflow, causing the dryer to overheat and eventually ignite. Cleaning it also drastically reduces drying times, saving energy.

Before You Start

  • Unplug the dryer.
  • Disconnect the vent only if you can safely access it.
  • Use a dryer-vent cleaning kit designed for the task.
  • Never operate the dryer with a disconnected or damaged vent.

Step-by-Step Guide

1

Unplug the dryer.

2

Pull the dryer away from the wall carefully.

3

Disconnect the vent hose.

4

Vacuum lint from the dryer connection and hose.

5

Clean the wall duct using a dryer-vent brush or appropriate vacuum system.

6

Reconnect the hose securely.

7

Check that the exterior vent flap opens during operation.

8

Run the dryer and verify normal airflow.

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Common Mistake to Avoid

Forgetting to check the exterior exhaust flap on the side or roof of your house. If the flap is stuck shut, the hot air can't escape, regardless of how clean the interior pipes are.

Frequently Asked Questions

How do I check the exterior vent flap?

Turn the dryer on high heat. Go outside and find where the air exhausts. The plastic or metal louvers should be blown wide open by a strong force of air. If they barely open, the duct is blocked.

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This page is the checklist. Read the full explanation for when to do the job and when to call a pro.