Levoit Humidifier LUH-A603-WCA Manual

The Levoit Humidifier LUH-A603-WCA is a 6-liter cool mist humidifier designed for medium to large rooms, featuring a 360° nozzle, three mist levels, optional night light, auto mode, timer function, essential oil tray, and a top-fill design for easy refilling. It operates with low noise and includes a built-in humidity sensor. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation & Setup 3. First-Time Use 4. Specifications 5. Controls and Settings 6. Operating Modes 7. Adding Essential Oils 8. Maintenance & Cleaning 9. Safety Information 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 6L water tank, 360° adjustable nozzle, Control Panel, Essential Oil Tray, Night Light, Air Inlet, Water Level Window.

Feature	Description
360° Nozzle	Adjustable mist direction for even coverage
Three Mist Levels	Low, Medium, High settings for custom humidity control
Auto Mode	Automatically adjusts mist output based on room humidity
Timer Function	Set 1-12 hours for automatic shut-off
Night Light	Optional soft lighting with on/off control
Essential Oil Tray	Add drops of essential oils for aromatherapy
Top-Fill Design	Easy to refill without removing the tank
Low Water Indicator	LED light alerts when water is low
Quiet Operation	Designed for low-noise performance, ideal for bedrooms
Built-in Humidity Sensor	Monitors room humidity for auto mode adjustment

Installation & Setup

Unpack and inspect contents. Place on a flat, stable, and level surface.

Remove all packaging materials from the humidifier and accessories.
Place the humidifier on a waterproof, level surface at least 12 inches away from walls and furniture.
Fill the water tank: Remove the tank cap, fill with clean, cool tap water (do not exceed MAX line), and replace cap securely.
Place the water tank back onto the base, ensuring it is properly seated.
Plug the power adapter into the humidifier's DC input, then plug into a standard 120V AC outlet.

WARNING! Do not use on carpet or near heat sources. Ensure the unit is upright to prevent leakage.

First-Time Use

Power on the humidifier; the control panel will illuminate.

Press the POWER button to turn on the unit.
Select mist level: Press the MIST button to cycle through Low, Medium, High.
Set timer (optional): Press TIMER to set 1-12 hours; the humidifier will automatically shut off.
Activate Auto Mode: Press AUTO to enable automatic humidity adjustment.
Adjust night light: Press the LIGHT button to turn the night light on or off.
Rotate the 360° nozzle to direct mist as desired.

CAUTION! Use only clean, cool water. Do not add water while the unit is operating or plugged in.

Specifications

Model: LUH-A603-WCA
Tank Capacity: 6 Liters (1.58 Gallons)
Room Coverage: Up to 505 sq ft
Mist Output: Up to 500 mL/h
Operating Time: Up to 60 hours on low setting
Noise Level: ≤ 30 dB
Power Consumption: 25W
Power Source: 120V AC, 60Hz
Dimensions: 11.8" x 7.3" x 11.8"
Weight: 5.5 lbs

Controls and Settings

Control Panel: POWER, MIST (Low/Med/High), AUTO, TIMER (1-12H), LIGHT (Night Light).

Indicator Lights: Power (Blue), Low Water (Red), Timer (Green), Auto (Yellow).

Mist Adjustment: Press MIST to cycle levels; LED indicates current setting. Timer: Press TIMER repeatedly to set duration; press and hold to cancel. Auto Mode: Press AUTO to activate; humidifier adjusts mist based on sensor. Night Light: Press LIGHT to toggle soft white light.

Operating Modes

Manual Mode: Select Low, Medium, or High mist output manually. Auto Mode: Built-in sensor maintains humidity between 40-60% RH. Timer Mode: Set 1-12 hours for automatic shut-off.

For continuous use: Select desired mist level; refill tank when low water indicator lights.
For sleep: Use Low mist, activate timer, and turn off night light if preferred.
For large rooms: Use High mist or Auto mode for optimal coverage.

Tip: Keep doors and windows closed for best humidity retention.

Adding Essential Oils

Use only 100% pure, water-soluble essential oils.

Ensure the humidifier is turned off and unplugged.
Pull out the essential oil tray located near the control panel.
Add 3-5 drops of essential oil into the tray (do not exceed).
Slide the tray back into place securely.
Plug in and turn on the humidifier; mist will carry the aroma.

WARNING! Do not add oils directly into the water tank or mist nozzle, as this may damage the unit. Clean the tray after each use.

Maintenance & Cleaning

Regular cleaning prevents mold and mineral buildup. Unplug before cleaning.

Daily: Empty and rinse the water tank with fresh water.
Weekly: Clean tank and base with a mixture of white vinegar and water (1:1 ratio). Soak for 20 minutes, then scrub gently with a soft brush.
Rinse all parts thoroughly with clean water and allow to air dry completely before reassembly.
Check and clean the air inlet filter monthly; replace if damaged.
Store in a dry place when not in use for extended periods.

CAUTION! Do not use abrasive cleaners, detergents, or submerge the base in water. Never operate without water.

Safety Information

Use only with 120V AC power outlet.
Keep out of reach of children and pets.
Do not operate without water in the tank.
Place on a stable, waterproof surface.
Do not cover the mist nozzle or air inlet.
Unplug before cleaning, refilling, or moving.
Use only clean, cool tap or distilled water.
If using essential oils, follow instructions precisely.

WARNING! Risk of electric shock if misused. Do not attempt to repair; contact customer service.

Regulatory Information

FCC Part 15 Compliance: This device complies with Class B digital device limits. UL Listed: Meets safety standards. Copyright © 2023 Levoit. All trademarks are property of Vesync Co., Ltd. For support, visit www.levoit.com or contact 1-888-726-8520.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No mist output	Empty tank/incorrect assembly	Fill tank with water; ensure tank is properly seated on base.
Low mist output	Mineral buildup/nozzle blockage	Clean nozzle and tank with vinegar solution; use distilled water.
Unit not powering on	Power connection/outlet issue	Check power adapter connection; try a different outlet.
Water leakage	Tank cap not secure/overfilling	Ensure cap is tight; do not exceed MAX water line.
Unusual noise	Low water/foreign object in base	Refill water tank; check for debris in the base and remove.
Night light not working	Setting disabled/LED issue	Press LIGHT button to enable; if persists, contact support.

Reset: Unplug for 5 minutes, then restart. If issues continue, perform a full cleaning.

Service: 1-888-726-8520; www.levoit.com/support