How to Fix Lint screen sensor dirty on LG DLGX5501V (Gas)

Lint screen sensor dirty

This step-by-step repair guide walks you through fixing lint screen sensor dirty on your LG DLGX5501V (Gas). 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.

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Common Symptoms & Causes

If your LG DLGX5501V gas dryer has a dirty lint screen sensor, you may notice several performance issues during normal operation.

• The dryer displays a “Clean Filter” warning message on the control panel mid-cycle
• Clothes take two or more cycles to fully dry even on high heat settings
• The dryer runs but shuts off early before the cycle completes
• Airflow feels noticeably weak at the exhaust vent during operation

This issue is typically caused by a buildup of dryer sheet residue and lint coating the moisture sensor bars on the lint screen, reducing their ability to accurately detect dryness levels.

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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

• Moisture sensor bars (pair)
• 0000-grade steel wool
• white vinegar
• soft cloth

Step-by-Step Repair Instructions

Step 1

Pull the lint screen out of its slot and clean it thoroughly under running water using a soft brush, then allow it to dry completely before reinstalling. A clogged lint screen restricts airflow through the drum, which simultaneously starves the moisture sensor of accurate readings and creates a fire hazard by trapping heat. Pro tip: hold the screen up to a light after cleaning — if light doesn’t pass evenly through the mesh, repeat the scrubbing.

Step 2

With the lint screen removed, shine a flashlight into the housing slot and locate the two narrow metal sensor bars mounted on the front bulkhead at the lint screen opening. These bars complete a low-voltage circuit through damp fabric; when they are coated with residue, the dryer ‘reads’ clothes as dry before they actually are, causing the cycle to end too early. Identifying their exact position now makes the next cleaning step faster and more precise.

Step 3

Using 0000-grade steel wool — the finest available, which won’t scratch the metal — scrub both sensor bars firmly to remove the waxy film left by dryer sheets and the mineral scale left by hard water. This residue is the most common cause of sensor dry failure on this model and is invisible under normal lighting, so scrub even bars that look clean. Safety note: unplug the dryer or shut off the gas and disconnect power at the breaker before touching any internal components.

Step 4

Dampen a cloth with plain white vinegar and wipe both bars down thoroughly, then follow with a dry cloth to remove all moisture and loosened residue. The mild acidity of vinegar dissolves any remaining mineral deposits that the steel wool broke loose, and the final wipe ensures no liquid sits on the electrical contacts. The bars should appear as bright, bare metal with no dull spots, streaks, or coating.

Step 5

Inspect both bars closely for pitting, deep corrosion, visible gaps, or physical damage that cleaning cannot correct — if any of these are present, the bars will never make reliable contact with fabric and must be replaced. Replacement is straightforward: remove the 2 retaining screws, disconnect the 2 wire connectors, and install the new sensor bar assembly in reverse order. Use a phone camera to photograph the wire connector positions before disconnecting them so you can confirm correct reassembly.

Step 6

Restore power and gas, then run a Sensor Dry cycle with a full, evenly damp load to verify the repair. A properly functioning sensor will shut the dryer off within approximately 2 minutes of the clothes reaching dry-to-the-touch condition — if the dryer runs significantly longer or shuts off while clothes are still damp, repeat the bar cleaning or confirm the replacement assembly is seated correctly. This live test is the only reliable confirmation that sensor contact has been fully restored.

Where to Buy Replacement Parts

Find genuine OEM and aftermarket replacement parts for your LG DLGX5501V (Gas) on Amazon:

• LG DLGX5501V moisture sensor bar replacement 6602EL3001A
• LG gas dryer lint screen filter cleaning brush
• LG dryer sensor bar steel wool cleaning technique

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.

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How Much Does This Repair Cost?

Cleaning a lint screen sensor yourself costs virtually nothing, or up to $10–$20 if you need a specialized cleaning brush or isopropyl alcohol. A professional service call for this issue typically runs $150–$300 once you factor in labor and diagnostic fees. Handling this simple DIY repair yourself can save you well over $100.

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Frequently Asked Questions

How do I know if the lint screen sensor on my LG DLGX5501V is dirty and not just the lint trap itself?

If your dryer displays a “Clean Filter” warning even after clearing the lint trap, the sensor bars on the lint screen housing are likely coated with residue. Wipe the two metal sensor bars with rubbing alcohol and a soft cloth to restore proper function.

Can dryer sheets cause the lint screen sensor to get dirty?

Yes, dryer sheet coating builds up on the sensor bars over time and prevents accurate moisture detection. Regular cleaning with rubbing alcohol every few months removes this waxy residue effectively.

Is it safe to run my LG DLGX5501V gas dryer with a dirty lint screen sensor?

Running the dryer with a dirty sensor can cause it to over-dry clothes or run longer cycles, wasting gas and increasing wear. Clean the sensor promptly to maintain efficiency and prevent unnecessary strain on the appliance.