How to Know If Your Dryer Vent Needs Cleaning

Dryer vent cleaning doesn't cross most people's minds until something goes wrong. That's a problem, because a clogged dryer vent is one of the leading causes of house fires in the United States. According to the U.S. Fire Administration, dryers cause roughly 2,900 home fires each year, and the leading factor is failure to clean them.

This is easy to prevent. Here's what to watch for.

Warning Signs Your Vent Is Clogged

Clothes are taking longer to dry. This is usually the first sign. If a load that used to dry in 45 minutes now takes an hour and a half, the dryer isn't getting enough airflow. Heat and moisture can't escape, so the dryer just keeps running and running without finishing the job.

The dryer is hot to the touch. Your dryer gets warm during normal operation, but it shouldn't be burning hot on the outside of the cabinet. If it is, heat is backing up inside because it has nowhere to go. That's hard on the machine and genuinely dangerous.

You smell something burning. Lint is highly flammable. If you get a burning smell during a cycle, stop the dryer immediately and check the vent. Don't keep running it hoping the smell goes away. It won't.

Lint is building up around the exhaust. Go outside and look at where your dryer vents out of the house. If there's a heavy lint buildup around the flap or on the wall around the vent opening, the air isn't moving the way it should.

The laundry room feels humid. When a vent is blocked, moisture has nowhere to go. It backs up into the room. If your laundry room feels unusually steamy during a dry cycle, that's a sign airflow is restricted.

How Often Should You Clean It?

The minimum is once a year. That applies to an average household doing a typical amount of laundry.

If you have a large family and run the dryer constantly, clean it every six months. If you have pets and the lint screen fills up fast, the vent needs more frequent attention too. If your vent run is long or has multiple bends, lint accumulates faster and cleaning more often makes sense.

The lint trap inside the dryer catches a lot, but not everything. Fine particles get past it and line the inside of the duct over time. Cleaning the trap after every load is good practice, but it doesn't replace cleaning the vent itself.

What Vent Cleaning Involves

Professional vent cleaning uses a rotary brush system. The brush runs through the entire duct from the dryer connection to the exterior exhaust, knocking loose lint off the walls of the duct. A high-powered vacuum pulls the loosened material out.

It takes about 30 to 45 minutes in most homes. Afterward, the airflow through the vent should be noticeably stronger.

Some homeowners try to clean their own vents with a brush kit from the hardware store. That can work fine if the vent run is short and straight. Longer runs or ducts with multiple elbows are harder to clean thoroughly without professional equipment.

After a cleaning, check your drying times. If a normal load is drying in a reasonable time and the dryer isn't running hot, the vent is doing its job.

Don't Put It Off

A clogged dryer vent isn't just an efficiency problem. It's a fire hazard. Lint ignites at a relatively low temperature and a blocked duct concentrates that heat. Fires can start inside the duct itself, inside the wall, or in the dryer cabinet.

This is one of the simplest appliance maintenance tasks there is, and one of the most important.

I'm Jake with RMAS Appliance Repair in Fort Collins. I serve customers throughout Northern Colorado and I can handle dryer vent cleaning along with any dryer repairs you might need at the same time. Give me a call at (970) 443-4367 to schedule a visit.

If your dryer is running slow, running hot, or you just can't remember the last time the vent was cleaned, it's time to take care of it.