If your dryer’s steam function is not working and the drum never fills with mist, the most likely culprit is a faulty control board or main control board that isn’t sending power to the steam components. After the control board, the next thing to check is the steam generator itself—if the generator gets power but produces no steam, it probably needs replacing. Less likely but easy to fix are simple issues like the water supply hose not being connected to the dryer or a blocked or damaged steam nozzle at the rear of the drum. Finally, the water inlet valve can fail and stop water flow; you can test the valve for electrical continuity with a multimeter to confirm it. Inspect the control board for burned components or shorts since it can be hard to bench-test, and follow safe power-off procedures before poking around. If you need parts, enter your model number on RepairClinic.com to see the exact replacement control board, steam generator, nozzle or inlet valve that fits your dryer.
01 - LG Dryer Control Board
If no power is getting to either the dryer's water inlet valve during the steam cycle or the steam generator, then it's likely the dryer's control board is defective and the cause of the steam function problem. The control board cannot be easily tested, but you can try to inspect it for signs of burning or a shorted-out component to help determine if the part should be replaced.
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If no power is getting to either the dryer's water inlet valve during the steam cycle or the steam generator, then it's likely the dryer's main control board is defective and the cause of the steam function problem. The control board cannot be easily tested, but you can try to inspect it for signs of burning or a shorted-out component to help determine if the part should be replaced.
If no power is getting to the dryer's water inlet valve during the steam cycle, but power is reaching the steam generator, then it's likely the steam generator is defective and will need to be replaced.
The water supply hose needs to be connected from the home's water supply to the water inlet valve on the dryer. The water line is usually connected to a “Y” connector and shares the same cold-water supply as the washer. Refer to the owner's manual for water hookup instructions.
Common
05 - LG Dryer Nozzle
The nozzle, normally located at the rear interior of the dryer, may be damaged or clogged with debris and unable to allow the steam to enter the drum area. Inspect the nozzle or any damage or obstruction and replace if necessary.
The dryer's water inlet valve provides the water necessary for the steam function to work. If there is no mist coming from the nozzle when the valve is energized, it's likely the inlet valve is defective. You can use a multimeter to test the valve for electrical continuity. If the valve tests negative for continuity, you'll know the part has failed and will need to be replaced.