Error Code d90
Exhaust ductwork approximately 90-95% blocked - FlowSense alert
Moderate
Address soon - your appliance may not work properly
Also displayed as: d90
How to Fix
- 1
Stop dryer immediately — do not use until exhaust system is repaired.
- 2
Inspect entire duct run for blockages, kinks, crushed sections, and excessive bends.
- 3
Clean all lint accumulation from duct, vent hood, and transitions.
- 4
Verify duct material is rigid or semi-rigid metal — replace flexible foil or vinyl duct if present.
- 5
Check that duct does not exceed recommended maximum length (accounting for 5 ft per 90° elbow equivalent).
- 6
Have system repaired or rerouted by a professional if restrictions cannot be resolved.
This Error Applies To
LG DLEX4200B Series Dryers
Related Error Codes
No power / power supply issue - electric dryer power cord not connected or house power supply incorrect
Steam water supply pump failure detected in test mode
Thermistor of blower housing - Outlet thermistor open or shorted
Power supply wire connection wrong or loose (Black-White-Red)
NFC module open or shorted
Exhaust ductwork approximately 80% blocked - FlowSense alert
Power failure - house fuse blown or circuit breaker tripped, or power outage occurred
NFC module type is wrong