RRepairGraph
LG · Dryer · D90

Diagnostic overview

The dryer detected an exhaust restriction of about 90 percent.

Diagnostic nodeD90DIAGNOSIS
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Use this as a diagnostic branchConfirm the exact model manual before ordering parts or opening the appliance.

Coverage: LG dryers equipped with the Flow Sense duct-blockage system.

GUIDANCE

Diagnostic overview for error D90

Use the sequence meaning → symptoms → accessible checks → stop conditions. For D90, the current manufacturer-sourced summary is: LG states that d90 means the exhaust duct is approximately 90 percent blocked and needs immediate attention.

Safe sequence

  1. 1Stop and unplug the dryer.
  2. 2Clean the lint filter and inspect only accessible duct sections.
  3. 3Use a professional vent-cleaning service for the home exhaust system.

Stop and get qualified help when

  • The dryer or vent is unusually hot
  • D90 returns after professional vent cleaning
Primary sourceLG USA — d90/d95 dryer errors ↗Verified 2026-07-17 · manufacturer