Important! Éteignez l'humidificateur et déconnectez-vous de l'alimentation avant la maintenance.

Lorsque la lumière de l'indicateur de votre humidificateur devient rouge, il est temps de changer le filtre Wick.

2026 versions of DreamWell and Invisible Mist humidifiers are equipped with smart water pump performance monitoring built directly into the devices firmware. Overtime, scale and other debris can build up on the water pump, preventing it from operating at peak performance. When reduced pump performance is detected, the device displays the letters "CL" to alert the user that it is time to clean and descale the tank and pump. 

2026 Invisible Mist (H335i)                                            2026 DreamWell (H38i/H76i) 

Very dry environmental conditions, like cold winters or hot dry climates, can make it very difficult to raise indoor humidity levels—even when the humidifier is working correctly.

A humidifier adds moisture to the air at a fixed maximum output rate. In dry conditions (especially when your home’s heating or cooling system is constantly running), moisture is being removed from the air faster than usual. This can limit how high the humidity level can rise, even in small rooms.

Factors that can prevent reaching your humidity target:

• Very cold outdoor temperatures
• Continuous indoor heating
• Dry incoming air from outside
• Natural air leaks around doors, windows, and walls
• Large temperature differences between indoor and outdoor air

In these conditions, maintaining 30–40% relative humidity is often realistic, while higher settings may not be achievable. 

If your DreamWell Humidifier appears to not be working, check the following :

1. The Water Tank Is Empty If the water tank is empty, the humidifier will stop operating.

• Check if the Low Water indicator is illuminated.
• Refill the water tank and restart the unit.

2. The Humidifier Is in Auto Mode When operating in Auto Mode, the humidifier will enter standby once the target humidity level has been reached.

• Check the display or the Blueair app to confirm whether the target humidity has been reached.
• If the target humidity has been reached, the unit will automatically resume operation when the humidity level drops.

3. The Pump Connector Is Misaligned If the three-pin connector between the pump and the upper body is not properly connected, the humidifier will not operate.

• Remove the upper body from the water tank.
• Align the dot on the upper body with the dot on the water tank (located above the MAX fill line).
• Reassemble the unit and ensure the connection is secure.

Still Having Issues?

Mineral buildup inside the pump may prevent the humidifier from operating correctly. If the steps above don't resolve the issue, descale the pump and water tank by following the instructions here. 

The short answer is that this is because the humidifier is working harder.

In dry conditions like cold winters or hot dry climates, more water is absorbed into the air and at a faster rate. This increased water usage is actually a sign that the humidifier is actively humidifying, not a defect, and will deplete the water in the humidifiers tank more rapidly.

In more humid seasons, the same tank may last significantly longer because the air can’t absorb as much additional moisture.

As humidifier season comes to an end, it’s important to properly care for your DreamWell unit before storing it. Following these simple maintenance steps will help ensure your humidifier performs at its best when you need it again next season. 

Also be sure to check out our cleaning videos on YouTube here: 

• DreamWell Cleaning Video 
• Invisible Mist Cleaning Video

1. Wash your Wick Filter

To maintain optimal performance, your wick filter should be cleaned or replaced at the end of the season. To clean your wick follow the instructions below: 

• DreamWell and Invisible Mist: You can clean your existing wick filter by soaking it with mild or acid cleanser. 20g citric acid for every 1L of water for 1 hour. Rinse well under running tap water. 
• DreamWell Only: You can wash your wick filter in a washing machine on gentle or delicate setting with mild detergent on low temperature (below 104°F/60°C)

2. Replace your Wick Filter

We recommend replacing your wick filter on a regular cadence to keep your humidifier performing at its best. 

• DreamWell every 12 months
• Invisible Mist every 6 months

Replacement filters can be purchased on Blueair.com at the links below: 

• DreamWell H38i (1 Gallon Tank)
• DreamWell H76i (2 Gallon Tank) 
• Invisible Mist 

3. De-Scale the Pump and Tank

Mineral deposits can build up over time, especially in areas with hard water. Descaling helps keep your humidifier running smoothly and ensures even moisture distribution.

To descale the tank and pump soak in a citric acid solution according to the below instructions:

• Mix citric acid powder with water only. Before starting descaling process, unplug the device and clean visible scale from inner tank surfaces by running under fresh water and wiping away scale with clean towel. Fill the tank with water then add citric acid to below concentrations.
  • For regular descaling maintenance (recommended monthly) use a 2% citric acid solution. For smaller tanks mix 1 pouch (1oz) of descaling powder in 1.5L (0.4 Gallons) of water.   For larger tanks, mix 2 pouches (2oz) of descaling powder in 3.0L (0.8 Gallons) of water.
• After the citric acid solution is mixed in the tank, remove the sponge prefilter from the pump, place it into the tank and then submerge the pump into the tank per regular assembly instructions, the bottom half of the pump should be fully submerged in the citric acid solution. Allow the pump and tank to soak in the solution for 2 hours.
• After 2 hours, remove the pump from the tank, rinse the pump and tank separately under fresh water and leave it out to dry. 

4. Safely Store Your Humidifier

Before storing your unit:

• Ensure the tank, filter, and all internal components are completely dry. 
• This helps prevent mold, mildew, and unwanted odors during storage. 

Once dry, store the humidifier in a clean, dry place.

For more information regarding your Humidifier maintenance, please check out our Humidifier Care Page here.

Over time, mineral deposits from water can build up inside your humidifier, especially around the tank and pump. This buildup, commonly called scale, can interfere with normal operation and may cause the humidifier to appear as if it is not working. 

Descaling is important because:  

• Scale can block or reduce pump performance, preventing proper water circulation. 
• Mineral buildup can trigger operational issues, even when water levels and settings are correct. 
• Regular descaling helps maintain efficiency, ensuring the humidifier runs smoothly and quietly. 
• It extends the lifespan of internal components, such as the pump and tank. 

If your humidifier has water in the tank, the humidity settings are correct, and the pump still does not appear to be working, descaling the pump and tank is a recommended next step. 

Pour réinitialiser l'indicateur de filtre, allumez l'appareil et long appuyez sur le bouton de vitesse du ventilateur pendant environ 15 secondes, jusqu'à ce que les LED clignotent 3 fois, puis relâchent.
Lorsque le filtre de mèche est remplacé, l'indicateur d'expiration du filtre doit être réinitialisé manuellement.