Airflow, Heat or Load: The Three Reasons Dryers Slow Down
| Category | What goes wrong | First check |
|---|---|---|
| Airflow | A clogged lint filter or vent, a crushed hose, a stuck outdoor flap | Watch the outdoor flap while the dryer runs |
| Heat | The dryer isn't heating: a tripped breaker or a closed gas valve | Run an empty heated cycle for 5 minutes and feel inside |
| Load | An overfilled drum, or heavy and light items mixed together | Fill the drum one-half to three-quarters full |
Checks summarized from Maytag's dryer troubleshooting guidance. Electric dryers typically use a 240-volt outlet on two breakers; gas models need the supply valve open.
A Five-Minute Dryer Vent Test
Empty the Lint Filter
If fabric softener sheets leave a film, wash the filter with warm water and a soft brush and let it dry.
Run the Dryer on a Heated Cycle
A few minutes is enough.
Go Outside to the Flap
It should open freely with a strong stream of warm air.
Check the Hose Behind the Dryer
Unplug the dryer first, then look for kinks, crushing or extra length.
Notice the Room
A hot laundry room or a burning smell means stop using the dryer until the vent is checked.
Want the causes ranked for your answers? Try the dryer section of the problem checker.
Load Size and Cycle Choices That Add Time
- Fill the drum about one-half to three-quarters full so items tumble freely
- Dry similar fabrics together; towels mixed with light clothes stretch the cycle
- Dry bulky items like comforters alone, stopping to shake them out
- Use sensor cycles for most loads and timed or higher heat for heavy items
- Skip air-only and low-heat settings when you need a fast dry
When the Problem Is Inside the Wall
If the flap barely moves after the lint filter and hose check out, the restriction sits in the vent line. Virginia's residential code calls for 4-inch smooth metal exhaust duct, no more than 35 feet long after allowances for each elbow, ending at a hood with a backdraft damper and no screen. Lint builds up along that run, and the U.S. Fire Administration reports that failure to clean was the leading factor in home clothes dryer fires from 2018 to 2020, at 31 percent.
A clogged line needs dryer vent cleaning; a crushed, too-long or screened vent needs dryer vent repair. Upper-floor laundry rooms often vent through the roof, which is covered under townhome dryer vents.
How Long Should a Load Take to Dry?
There's no single right number, because load size, fabric and cycle all change it. The clearest warning sign is change over time: loads that used to finish in one cycle now need two, or clothes come out hot but still damp. That shift points to airflow before it points to a worn-out dryer.