Honeywell Humidifier HWM440 Series Manual

The Honeywell HWM440 Series is a cool mist humidifier designed to add comfortable moisture to dry indoor air. It features a large tank capacity, adjustable humidity control, quiet operation, an easy-to-clean design, an automatic shut-off function, a wicking filter, and a refill indicator light. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Water Tank, Base Unit with Motor, Wick Filter, Humidity Control Dial, Power Button, Refill Indicator, Mist Nozzle.

Installation & Setup

Unpack and inspect all contents. Place on a firm, flat, level surface away from direct sunlight and heat sources.

1. Remove all packaging materials from the tank and base.
2. Install the wick filter: Remove from packaging, soak in cool water for 15-20 minutes, then insert into the filter frame in the base.
3. Fill the water tank: Carry tank to sink, remove cap, fill with cool, clean water. Replace cap securely.
4. Place tank on base: Align tank with base and set it down firmly. Ensure it is seated correctly.
5. Plug into a standard 120V AC electrical outlet.

WARNING! Use only clean, cool water. Do not use hot water or add oils, chemicals, or medications to the water tank. Ensure hands are dry when handling the plug.

First-Time Use

After installation, follow these steps to begin operation.

1. Ensure the wick filter is properly installed and the tank is filled and seated.
2. Plug the power cord into the electrical outlet.
3. Press the POWER button to turn the unit on. The indicator light will illuminate.
4. Turn the HUMIDITY CONTROL dial to your desired setting (Low, Medium, High).
5. Adjust the 360° mist nozzle to direct the mist flow away from walls, furniture, and electronics.
6. The unit will begin producing a cool mist. The refill light will come on when the tank is nearly empty.

CAUTION! Place the humidifier on a water-resistant surface. Do not operate without the wick filter installed.

Specifications

• Model Series: HWM440 (HWM440A, HWM440B, etc.)
• Tank Capacity: 1 Gallon (3.8 Liters)
• Room Coverage: Up to 400 sq. ft.
• Run Time: Up to 24 hours on low setting
• Output: Adjustable cool mist
• Filter Type: Demineralization Wick Filter (replaceable)
• Controls: Manual Dial Control, Power Button
• Indicators: Power On Light, Refill Indicator Light
• Power Source: 120V AC, 60Hz
• Safety Features: Automatic Shut-Off

Controls and Settings

Front Panel: POWER Button, HUMIDITY CONTROL Dial, Refill Indicator Light.

Operation: POWER turns unit On/Off. HUMIDITY CONTROL dial adjusts mist output (Low for quiet, minimal moisture; High for maximum output). Refill Light glows red when water level is low.

Settings Guidance: Use Low setting for maintaining slight humidity or overnight use. Use Medium for average dry conditions. Use High for very dry air or rapid humidity increase. Always start with a lower setting and increase as needed.

Operation

Daily operation is simple once set up.

1. Check water level daily. Refill when the Refill Indicator light comes on or the mist output decreases.
2. To refill: Turn unit OFF and unplug. Lift tank off base, carry to sink, unscrew cap, empty any remaining water, refill with cool water, replace cap, and return tank to base.
3. Plug in and press POWER to restart. The unit will resume at the previously set dial position.
4. Adjust the mist nozzle periodically to ensure even room coverage.

Tip: For best performance, use distilled or demineralized water to reduce mineral deposits and extend filter life.

Maintenance & Cleaning

Regular cleaning prevents mold, mineral buildup, and ensures efficient operation.

1. Daily: Refill with fresh, cool water.
2. Weekly: Clean the water tank and base.
   • Unplug unit. Remove tank and empty all water.
   • Clean tank interior with a soft brush or cloth and a mixture of mild dish soap and white vinegar or a humidifier cleaner. Rinse thoroughly.
   • Wipe the base exterior with a damp cloth. Do not immerse base in water.
   • Allow all parts to air dry completely before reassembly.
3. Seasonal: If storing, clean thoroughly as above, ensure all parts are completely dry, and store in original box in a cool, dry place.

WARNING! Never use harsh chemicals, abrasives, or detergents not intended for humidifiers. Always unplug before cleaning.

Filter Replacement

The wick filter should be replaced every 1-2 months during use, or when visibly discolored or hardened.

1. Turn off and unplug the humidifier. Remove the water tank.
2. Locate the used wick filter in the base. Pull it straight up and out of the filter frame.
3. Take the new filter from its packaging. Soak it in cool water for 15-20 minutes.
4. Insert the soaked filter into the filter frame in the base. Ensure it is seated flat.
5. Replace the water tank, plug in the unit, and resume operation.

Note: Using the humidifier without a filter or with an old filter can reduce performance and lead to mineral dust (white dust) being emitted.

Regulatory Information

This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. Copyright © Honeywell International Inc. Honeywell and the Honeywell logo are registered trademarks of Honeywell International Inc. For support, replacement filters, and more information, visit www.honeywellpluggedin.com or contact customer service at 1-800-332-1110.

Troubleshooting

Reset: Unplug unit for 2 minutes, then plug back in.

Service: For issues not resolved above, contact Honeywell Customer Service at 1-800-332-1110 or visit www.honeywellpluggedin.com. Do not attempt to repair the unit yourself.