Lint filter full sensor
This step-by-step repair guide walks you through fixing lint filter full sensor on your LG DLEX8900V (Electric). With the right tools and parts, most homeowners can complete this repair in 1–2 hours and avoid a costly service call.
Part of our Top 20 Dryer Models & Common Repair Issues Guide. Browse all dryer repair guides for related models and issues.
“`htmlCommon Symptoms & Causes
If your LG DLEX8900V is displaying a lint filter warning, these specific symptoms typically point to a faulty lint filter full sensor.
- The dryer display shows a “Clean Filter” alert that won’t clear after cleaning
- The dryer stops mid-cycle and displays the lint filter warning light
- The dryer refuses to start and the filter indicator light stays illuminated
- The sensor triggers repeatedly even with a freshly cleaned, empty lint filter
This issue is most commonly caused by a failed or dirty lint filter full sensor, lint buildup on the sensor contacts, or normal wear that prevents the sensor from accurately detecting filter status.
“`Safety First
- Unplug the dryer from the power outlet before starting any repair — never work on a live appliance.
- Wear work gloves when handling metal brackets, sheet metal edges, or sharp components.
- Take photos with your phone before disconnecting any wiring harnesses or connectors.
- Work in a well-lit area with enough floor space to lay removed panels flat.
Tools & Parts Needed
Essential Tools
- Phillips #2 screwdriver
- ¼” nut driver
- Putty knife
- Multimeter
- Work gloves
Replacement Parts
Step-by-Step Repair Instructions
Step 1
The LG DLEX8900V uses an optical lint sensor mounted inside the filter slot to detect buildup — when fine lint dust coats the sensor lens, it scatters the light beam and causes the dryer to falsely report a full filter even after cleaning. Identifying this as the root cause early saves you from repeatedly cleaning a screen that was never the problem. Before starting, unplug the dryer from its 240V outlet to eliminate any electrical hazard during inspection.
Step 2
Remove the lint screen and clean it thoroughly under running water, then use a long-handled brush to sweep out the housing slot itself. Lint that bypasses the screen accumulates inside the slot and can block or contaminate the sensor independently of the screen, so cleaning only the screen will not resolve the fault. Make sure the slot is fully cleared before moving on to the sensor lens.
Step 3
Locate the small optical sensor window inside the lint housing slot and gently wipe it with a dry cotton swab using a single, one-directional stroke — never scrub back and forth, as this can push lint deeper into the lens or scratch the surface. The sensor works by projecting a light beam across the slot, so even a thin film of lint dust on the lens is enough to trigger a false full-filter reading. Use no liquids on the sensor lens itself, as moisture can damage the optical components.
Step 4
If you regularly use dryer sheets, wax residue builds up on the lint screen mesh and blocks airflow even when the screen looks visually clean — soak the screen in warm water with a few drops of dish soap for 10 to 15 minutes, then scrub with a soft brush, rinse until water flows freely through the mesh, and allow it to dry completely before reinstalling. Reinstalling a damp screen can create mold growth and may also interfere with sensor readings. Hold the screen up to a light source after drying — you should see light pass evenly through the entire mesh surface.
Step 5
Some LG models allow you to reset the filter alert independently by pressing and holding the Filter button for 3 seconds after cleaning, which clears the stored alert flag without requiring a full power cycle. This is useful for confirming whether the alert resets cleanly after your cleaning steps, but do not use it as a substitute for actually cleaning the sensor and screen — the alert will return immediately on the next cycle if the underlying issue is not resolved. Treat this step as a diagnostic confirmation, not a fix.
Step 6
Plug the dryer back in and run a full timed cycle to verify the alert does not return — if it does, the optical sensor itself is faulty and needs to be replaced rather than cleaned. The sensor assembly is secured by 2 screws and a wiring harness connector, making it a straightforward part swap accessible from the filter slot area without major disassembly. Order the replacement sensor by your exact model number, as sensor placement and harness connectors vary across LG dryer models.
Where to Buy Replacement Parts
Find genuine OEM and aftermarket replacement parts for your LG DLEX8900V (Electric) on Amazon:
- LG DLEX8900V lint filter sensor cleaning procedure
- LG electric dryer ductless full sensor lint filter alert
- LG dryer filter sensor reset hold button
When to Call a Professional
If the issue persists after completing all steps above, the problem may involve the sealed refrigerant system, a failed main control board, or wiring that requires specialized diagnostic equipment. Contact a licensed appliance technician — attempting sealed-system repairs without EPA 608 certification is illegal and unsafe.
“`htmlHow Much Does This Repair Cost?
Replacing the lint filter full sensor on an LG DLEX8900V typically costs $15–$45 in parts when doing it yourself. A professional service call for the same repair usually runs $150–$300, including labor and parts. By tackling this repair yourself, you can save over $100 or more while restoring your dryer’s performance quickly.
“`Frequently Asked Questions
Why does my LG DLEX8900V keep showing a lint filter full alert even after I clean the filter?
The sensor itself may be coated with fabric softener residue or lint debris, preventing it from reading correctly. Clean the sensor contacts with a dry cloth or soft brush and retest the dryer.
Where is the lint filter full sensor located on the DLEX8900V?
The sensor is typically positioned inside the lint filter housing near the front door opening. Consult your owner’s manual for the exact location before beginning any repair.
Do I need to unplug the dryer before replacing the lint filter sensor?
Yes, always disconnect the dryer from its power source before attempting any repair. Working on a live appliance creates a serious risk of electric shock.