My humidifier is reading between 80-90% when my hygrometer reads under 60% Is something wrong with it? It's on a stool and not too close to anything.

The same thing has been happening with both of my new Levoit humidifiers. Try changing the setting to Auto or Warm Mist. I have been able to get the machine to respond 5 different times by changing the setting. The reading starts to plummet back down to the real humidity reading and the machine will turn on again. I have reached out to the company to let them know of the issue. We'll see what they do.

Cool vs warm mist control: I am not clear on the controls when used together. What do each control?

Cool mist is the normal ultrasonic which basicly vibrates the water molecules until they turn to a mist. This transition from liquid to a visable vapor or gas feels cool to the touch, not cold but slightly cooler. If you turn on the heater to low or high it heats the liquid water making the mist feel warm. I dont use the heater because I dont have it misting on my body and it takes up alot more power. The warm mist is just the temp of the mist no other real effect or complications.

How often do I change the filter? Thank you

That I’m not sure…. And of course I don’t use fancy water I use the water out of my tap water and it’s super easy the way they designed that part, but I would say since I’m using tap I probably want to change it before spring starts then summer? Then fall? N winter?

Can you put water softening tablets in these? We have well water, not hard according to tests but would want to take the extra step if possible

No. Do not add softening tablets. You would just be adding more dissolved salts that would come out of solution and leave a crusty film. It would e worse than using well water.

Levoit Lv600s Smart Warm And Cool Mist Humidifiers For Home

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Description

💨 Elevate your air game — smart, silent, and soothing comfort all day and night!

WHISPER QUIET SLEEP MODE - Operates under 28 dB with no light distractions, perfect for undisturbed rest.
DUAL MODE MIST TECHNOLOGY - Switch between warm and cool mist to tailor your environment seasonally or anytime.
AROMATHERAPY READY AMBIANCE - Add essential oils to the aroma box and transform your space into a sensory haven.
WHOLE ROOM HYDRATION MASTERY - Covers up to 753 sq. ft. with consistent, even mist for ultimate comfort.
SMART CONTROL AT YOUR COMMAND - Seamlessly adjust humidity, schedules, and modes via VeSync app or voice assistant.

The LEVOIT LV600S is a premium 6-liter smart humidifier designed for large rooms up to 753 sq. ft., featuring patented hybrid warm and cool mist technology for fast, even humidification. Controlled effortlessly via the VeSync app or voice commands, it offers customizable schedules, a whisper-quiet sleep mode under 28 dB, and an aroma diffuser for essential oils. Its top-fill design and auto shut-off ensure convenience and safety, making it an ideal wellness upgrade for modern homes.

Specifications

ASIN	B095KGXPW5
Best Sellers Rank	#6,208 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #12 in Humidifiers
Brand	LEVOIT
Brand Name	LEVOIT
Capacity	6 Liters
Color	White
Control Method	Touch
Customer Reviews	4.4 out of 5 stars 34,042 Reviews
Filter Type	Pre Filter
Floor Area	753 Square Feet
Included Components	1 x Smart Ultrasonic Humidifier 1 x Cleaning Brush 3 x Aroma Pads (1 pre-installed) 3 x Absorption Pads (1 pre-installed) 2 x Water Filter Sponge (1 pre-installed) 1 x User Manual 1 x Quick Start Guide
Item Dimensions D x W x H	7.7"D x 11.6"W x 11.3"H
Item Shape	Square
Item Type Name	6L Warm and Cool Mist Top Fill Air Vaporizer for Home, Smart App & Voice Control, Quickly Humidify Whole House up to 753 sq.
Item Weight	6 Pounds
Manufacturer	LEVOIT
Material	BPA free, suitable for babies and adults
Model Name	Humidifiers for Bedroom Large Room
Model Number	LUH-A603S-WUS
Operation Mode	Ultrasonic
Other Special Features of the Product	Aroma Diffuser, Easy Fill, Quiet, Remote Control, Warm and cool mist, Smart Control, Top fill,Auto Shut Off,Run all night
Part Number	LUH-A603S-WUS
Power Source	ac
Room Type	Bedroom, Dining Room, Large Room, Office, Yoga Room
Runtime	50 hours
Smart Home Compatibility	Smart Home Compatible
Special Feature	Aroma Diffuser, Easy Fill, Quiet, Remote Control, Warm and cool mist, Smart Control, Top fill,Auto Shut Off,Run all night Special Feature Aroma Diffuser, Easy Fill, Quiet, Remote Control, Warm and cool mist, Smart Control, Top fill,Auto Shut Off,Run all night See more
UPC	810043375023
Unit Count	1.0 Count
Voltage	120 Volts
Warranty Description	2
Wattage	280 watts

Reviews

A**R

26.02.2026

N**N

22.04.2026

K**G

2.05.2026

A**S

17.02.2026

A**.

21.01.2026

E**R

27.03.2026

W**W

20.04.2026

S**5

9.03.2026

V**A

2.03.2025

Z**I

17.10.2022

I**O

24.05.2019

R**.

21.03.2022

T**Y

28.08.2022

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LEVOIT LV600S Smart Warm and Cool Mist Humidifiers for Home Bedroom Large Room, (6L) 753ft² Coverage, Quickly & Evenly Humidify Whole House, Easy Top Fill, App & Voice Control - Quiet Sleep Mode

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