What a complete cleaning is trying to accomplish
A dryer needs a clear path to move warm, moist air outdoors. Lint can collect beyond the lint screen, particularly along long runs, bends and terminations. Cleaning methods vary with the vent layout, but the goal is the same: remove buildup through the exhaust path and verify that air can move outside.
Before service, note the symptoms
- Loads that suddenly need more than one cycle
- A dryer cabinet or laundry room that feels unusually hot
- Weak airflow at the exterior hood while the dryer is running
- A musty or hot smell around the appliance
- Lint collecting around the exterior termination
How often should a dryer vent be cleaned?
The U.S. Fire Administration advises homeowners to clean dryer vent ductwork every year. Buildup varies with dryer use, vent length, the number of turns in the duct and how well the exterior termination stays clear.
Cleaning versus appliance repair
If exterior airflow is strong and the vent run is clear, a heating element, thermostat, sensor or other dryer component could be the culprit. A good diagnosis should make it clear when the vent does not appear to be the problem.
