LG DLEX4000W D90 Error Code – Dryer Airflow Restriction
The D90 error code on the LG DLEX4000W dryer indicates that airflow through the dryer vent system is restricted.
This warning appears when the dryer detects reduced airflow caused by lint buildup or blocked vents.
Symptoms
- Dryer takes longer to dry clothes
- D90 error appears
- Dryer overheating
Causes
- Lint buildup inside vent hose
- Blocked exterior vent hood
- Crushed vent hose
Fixing the Problem
Clean the Dryer Vent
Disconnect the vent hose and remove lint buildup.
Inspect Exterior Vent
Ensure the outside vent hood opens freely.
