Clogged Dryer Vent: A Fire Hazard Behind the Wall

Most people judge a dryer by whether the towels come out dry. The more important question is where the hot, linty air goes afterward. Restricted airflow is consistently named as a leading cause of dryer fires in the United States, and it is entirely preventable.

How a vent turns dangerous

Lint is flammable, and the heater sits close to the airflow path. If the vent is packed or crushed, hot air cannot leave, so temperatures climb inside the cabinet and duct well above what the machine was designed for. Long vent runs through an attic or garage wall, common in Houston-area homes, give lint more places to collect.

Signs to act on

• Loads that need two or three cycles
• A dryer top or vent hood that feels very hot
• A scorched or burning odor while it runs
• An E12 overheating message

If you smell burning

Stop the cycle, unplug the dryer or shut off its breaker, and leave it off until someone has inspected it. Another cycle will not fix the problem on its own.

A routine that works

1. Empty the lint screen after every load.
2. Look behind the dryer for a kinked or flattened duct.
3. Have the full vent run cleaned once a year.

Also pull the dryer out occasionally and vacuum the lint that collects behind and underneath it, because that area is easy to forget and just as flammable.

These steps cost far less than the damage they prevent. If your dryer shows any warning sign, our dryer repair page explains the inspection, and you can book a visit to have the airflow checked.