LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam SENSOR FOULING Error Fix: Humidity Sensor Fouling

Dryer sheet residue coats humidity sensor bars, preventing accurate moisture detection. Causes over/under-drying on sensor cycles. Clean bars with rubbing alcohol monthly.

Low severity2 fixes available

Quick Answer

Error SENSOR FOULING on the LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam means: Humidity Sensor Fouling. The top-ranked community fix is “Replace Humidity Sensor Assembly” (medium difficulty, ~40 min, DIY cost: $15-$20). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · dryer

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many dryer repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $120-$180.

Other LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam Error Codes

Belt Wear/Breakage

Child Lock Active

Exhaust Duct 75% Blocked

2 fixes

d80

Exhaust Duct 80% Blocked

2 fixes

d90

Exhaust Duct 90% Blocked

2 fixes

d95

Exhaust Duct 95% Blocked

2 fixes

DRUM ROLLERS WORN

Drum Roller Bearing Wear

2 fixes

E13

Motor Start Error

2 fixes

People Also Ask About LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam Error SENSOR FOULING

What does error code SENSOR FOULING mean on a LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam?

Error code SENSOR FOULING on the LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam means: Humidity Sensor Fouling. Dryer sheet residue coats humidity sensor bars, preventing accurate moisture detection. Causes over/under-drying on sensor cycles. Clean bars with rubbing alcohol monthly.

How do I fix error code SENSOR FOULING on my LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam?

The most successful fix is "Replace Humidity Sensor Assembly" (medium difficulty, ~40 minutes). Estimated DIY cost: $15-$20. HomeMD has 2 community-ranked fixes for this error.

Is error code SENSOR FOULING on a LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam serious?

This error is rated low severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Can I fix LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam error SENSOR FOULING myself?

Yes — the top-ranked community fix ("Replace Humidity Sensor Assembly") is rated medium difficulty and takes about 40 minutes. Tools needed: T20 Torx screwdriver, Multimeter.

How much does it cost to repair LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam error SENSOR FOULING?

DIY cost: $15-$20. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam have?

The LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam has 8 other known error codes, including: BELT WORN (Belt Wear/Breakage), CL (Child Lock Active), d75 (Exhaust Duct 75% Blocked), d80 (Exhaust Duct 80% Blocked), d90 (Exhaust Duct 90% Blocked), and 3 more.

What other error codes does the LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam have?

The LG DLEX3900W 7.4 cu. ft. Smart Electric Dryer with TurboSteam has 8 other known error codes:

BELT WORN — Belt Wear/Breakage (2 fixes)
CL — Child Lock Active (2 fixes)
d75 — Exhaust Duct 75% Blocked (2 fixes)
d80 — Exhaust Duct 80% Blocked (2 fixes)
d90 — Exhaust Duct 90% Blocked (2 fixes)
d95 — Exhaust Duct 95% Blocked (2 fixes)
DRUM ROLLERS WORN — Drum Roller Bearing Wear (2 fixes)
E13 — Motor Start Error (2 fixes)

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