What to do if my Guardian PUREGUARDIAN H4500 is not producing water vapor?
- NntaylorAug 13, 2025
If your Guardian Humidifier isn't producing water vapor, try unplugging it and then plugging it back in. Also, make sure the tank is correctly attached.

What to do if my Guardian PUREGUARDIAN H4500 is not producing water vapor?
If your Guardian Humidifier isn't producing water vapor, try unplugging it and then plugging it back in. Also, make sure the tank is correctly attached.
Why is the humidity level low on my Guardian PUREGUARDIAN H4500?
A low humidity level in your Guardian Humidifier could be due to a dirty ultrasonic disk. Clean the disk to resolve this. Also, try replacing the water with cool, but not cold water.
Why is my Guardian PUREGUARDIAN H4500 blowing air but no vapor?
If your Guardian Humidifier is blowing air but not producing water vapor, try removing some water from the tank. You might also need to increase the desired humidity setting. As well as that, wash the tank out and try again.
Why does my Guardian Humidifier smell bad?
A bad smell from your Guardian Humidifier is often due to poor maintenance or dirty water. To resolve this, thoroughly clean the humidifier and fill it with fresh water.
What to do if my Guardian Humidifier is making too much noise?
If your Guardian Humidifier is louder than usual, make sure it is placed on a flat, level, hard surface. Also, ensure that the unit is NOT placed on carpeting, towels, blankets, or other soft surfaces.
How to fix white dust forming on furniture from my Guardian PUREGUARDIAN H4500?
If you notice white dust forming on furniture near your Guardian Humidifier, it's likely due to hard water deposits. Try using distilled water to prevent this issue.
What to do if the area around my Guardian PUREGUARDIAN H4500 Humidifier is getting wet?
If the area around your Guardian Humidifier is getting too wet, ensure the unit is at least waist high. Additionally, turn the spray control down and point the spray nozzle away from objects.
How long does it take for my Guardian PUREGUARDIAN H4500 to produce warm humidity?
It may take 10-15 minutes for your Guardian Humidifier to produce warm humidity.
| Type | Ultrasonic Humidifier |
|---|---|
| Tank Capacity | 1.5 gallons |
| Run Time | Up to 120 hours |
| Output | 2.5 gallons per day |
| Color | White |
| UV-C Light | Yes |
| Features | Adjustable mist control, night light |
| Power Source | AC Power |
Details model number, power, capacity, dimensions, and weight of the humidifier.
Illustrates and labels the different components of the humidifier for identification.
Explains selecting humidification temperature and notes on warm mist performance.
Describes the Refill LED, auto shut-off, and restart behavior when water is low.
Explains how to adjust the humidity output volume using the control dial.
Details the technology preventing mold and mildew growth within the water tank.
Guidance on cleaning the interior of the humidifier unit, avoiding ports.
Instructions for cleaning the external surfaces of the humidifier with a damp cloth.
How to clean water spots from the inside of the water tank using a soft cloth.
Instructions for cleaning the ultrasonic disk to ensure proper mist generation.











