Symptoms
- Filter indicator light stays lit after cleaning the lint trap
- Light comes on very quickly into a new cycle
- Drying performance also seems reduced
- Light was working normally until recently
Likely causes
- CommonFilter only partially cleaned, missing lint packed into the meshSurface cleaning can miss lint embedded deep in fine mesh filters.
- CommonAirflow restriction sensor detecting a clogged vent, not just the trapSome models measure actual airflow and will keep the light on if the exterior vent is restricted even with a clean trap.
- PossibleFilter genuinely needs a deeper wash for oily lint buildupDryer sheet residue and fabric softener can create a film that a quick brush won't remove.
- Less commonFaulty airflow sensor giving a false restriction readingA malfunctioning sensor can keep the indicator on even when airflow is genuinely fine.
What to do
- Remove the lint filter and wash it with warm soapy water to remove any oily film, not just visible lint, then let it dry fully before reinserting.
- Check and clear the full exhaust vent duct from the dryer to the exterior, not just the lint trap area.
- Confirm the exterior vent hood flap opens freely and isn't blocked.
- Run a cycle and see if the light resets after a thorough trap wash and vent check.
- If the light stays on with a genuinely clear vent and clean filter, this may point to a sensor issue.
- Consult your manual for how to manually reset the indicator light if your model requires a specific action beyond just cleaning.
- Have a technician check the airflow sensor if the light won't clear despite a confirmed clean vent and filter.
Tools and parts
- Warm soapy water
- Vent brush
When to call a pro
If a thorough vent and filter cleaning doesn't clear the indicator, have a technician check the airflow restriction sensor.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.