RRepairGraph
LG · Dryer · D90

When a technician is needed

The dryer detected an exhaust restriction of about 90 percent.

Diagnostic nodeD90TECHNICIAN
!
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

When a technician is needed for error D90

Qualified help is appropriate when The dryer or vent is unusually hot; D90 returns after professional vent cleaning. Do not bypass sensors or energize an opened appliance.

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