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“Check Vent” Light on a Dryer: What It Means and What to Do
A “check vent” light warns that air is not leaving the dryer freely. Here is what it means, how to clear it, and what to do if it stays on.
Last reviewed October 23, 2026. Written and reviewed by the Plano Dryer Pros team. How we create content
A “check vent” or vent light on a dryer warns that airflow is restricted, usually from lint in the vent or a blocked outside hood. Clear the lint screen, then the duct and the hood, and run the dryer again. If the light stays on, the vent may be crushed or too long. Do not keep running an overheating dryer.
Key takeaways
- The light warns of restricted airflow, which is a fire risk and slows drying.
- Clear the lint screen first, then the duct, then the outside hood.
- A light that returns after cleaning points to a crushed duct, a very long run, or a damaged hood.
- On some LG dryers, an airflow warning appears as a D80 code.
What the light means
Many dryers can sense when air is not leaving freely, and some show a light or a message such as “check vent,” “vent” or “clean lint.” Names vary by brand and model, so check your manual. The cause is almost always lint or a blockage somewhere between the dryer and the outside. See the LG D80 airflow code for how one brand reports it.
What does the check vent light mean on a dryer?
It warns that air is not leaving the dryer freely, usually from lint in the vent or a blocked outside hood. Clear the lint screen, the duct and the hood, then run the dryer again. A light that keeps returning points to a crushed or very long vent. Names vary, so check your manual.
Clear it in order
- Stop the dryer and let it cool.
- Clean the lint screen, and wash it if it is coated with softener film.
- Unplug the dryer, pull it out carefully, and check the duct behind it for kinks or lint.
- Clear the duct from both ends, and clear the outside hood.
- Make sure the hood flap opens freely.
- Run the dryer empty on high for ten minutes and feel the air at the hood: it should be strong.
See how to clean a dryer vent and the vent safety guide.
How do I reset the check vent light?
Clear the cause first: the lint screen, the duct and the outside hood. On many dryers the light then clears by itself on the next cycle. If your manual describes a reset step, such as opening and closing the door or pressing a button, follow it. A light that returns means the vent is still restricted.
If the light stays on
| Likely cause | What to do |
|---|---|
| A crushed or kinked duct behind the dryer | Reposition or replace that section |
| A very long run or many bends | Have the vent assessed |
| A damaged, blocked or stuck outside hood | Clear or replace the hood |
| Plastic or thin foil duct | Replace it with metal duct |
| A faulty sensor | Have it tested once the vent is proven clear |
See vent repair vs vent cleaning and the vent cleaning page.
Is it safe to keep using a dryer with the vent light on?
Not for long. Restricted airflow overheats the dryer and raises the fire risk, and it also wastes energy. Stop using it until the vent is cleared. If the dryer is very hot, smells burnt, or the light returns right away, have the vent professionally checked.
Sources
- Your dryer’s owner’s manual, which governs over any general guidance on this page, because control names and behavior vary by brand and model
- Plano Dryer Pros estimates of typical local repair pricing. See our Editorial Policy.
Frequently asked questions
Does every dryer have a check vent light?
No. Many have a lint reminder, and some have an airflow sensor. Check your manual.
Why does my dryer say check vent right after cleaning?
The vent may still be restricted somewhere, such as a crushed duct or a blocked hood.
How often should I clear the vent?
At least once a year, and sooner if drying slows or the light comes on.
Can I clear the vent myself?
Often, with the dryer unplugged. Long runs, roof vents and damaged duct are better left to a professional.
Get your dryer working again
Call and a person will answer, or request a repair online. You get the full price in writing before any work starts.