LG Dryer D90 Error Code

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What D90 means

On many LG dryer models, D90 belongs to the airflow restriction category. The appliance is warning that air is not moving freely through the vent path.

Codes and exact steps can vary by model number, production year, and regional design. Use this guide as first-pass orientation and confirm model-specific details with the manufacturer source listed below.

Before you start

Write down the full model number and the exact display text before changing parts or clearing the control. Similar-looking codes can map to different model families, and a reset can erase useful timing clues.

If the appliance shows active leaking, a burning smell, smoke, gas odor, repeated breaker trips, or water near power, stop this checklist and use qualified service.

Model numbers affected

Commonly searched LG model families include electric dryers, gas dryers, vented dryers, heat-pump dryers, and compact laundry models.

This is not a confirmed model-number list. Similar display codes can mean different things across model families, production years, and regional designs. Match the exact code to the full model number on the appliance tag before ordering parts or opening panels.

Common causes

• Lint screen or exhaust duct is restricted
• Exterior vent flap is blocked or stuck
• Long, crushed, or kinked dryer duct
• Moisture sensor or airflow sensor reading outside expected range

How to check and fix D90

1. Confirm the model number and exact code spelling.
2. Clean the lint screen and the lint screen housing.
3. Check the outside vent while the dryer runs; airflow should be strong.
4. Disconnect power before inspecting a duct connection behind the dryer.
5. Remove crushed foil ducting if present and replace it with rigid or semi-rigid metal ducting where allowed by local code.
6. Run one controlled reset only when the appliance is dry, stable, and safe.
7. Stop if D90 returns immediately or appears on an empty test.

Safe checks before service

• Clean the lint screen and the lint screen housing.
• Check the outside vent while the dryer runs; airflow should be strong.
• Disconnect power before inspecting a duct connection behind the dryer.
• Remove crushed foil ducting if present and replace it with rigid or semi-rigid metal ducting where allowed by local code.

What not to do

• Do not keep running heated dryer cycles after an airflow or heat warning.
• Do not use foil duct, crushed duct, or blocked exterior vents.
• Do not bypass locks, sensors, fuses, or leak protection to force a cycle.
• Do not open powered panels or touch wiring for a code check.
• Do not assume one display code proves one specific part has failed.

Stop and call a technician when

• The code returns after the vent path is verified clear.
• The dryer smells hot, trips a breaker, or shuts off repeatedly.
• The unit is stacked or hard to move safely.

FAQ

Aliases and related display text

People may search for this same condition using different capitalization or alternate display forms.

• D90
• Flow Sense 90

Sources

Related safety guides