Honeywell Humidifier HE420A Manual

The Honeywell Humidifier HE420A is a 4-gallon cool mist humidifier designed to add moisture to dry air in medium to large rooms. It features a wicking filter system, adjustable humidity control, a refill indicator light, a quiet operation mode, an easy-to-carry handle, and a 360-degree mist outlet. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Water Tank, Base with Motor, Wick Filter, Control Panel, 360-Degree Mist Nozzle, Refill Indicator Light, Carry Handle.

Installation & Setup

Unpack and inspect all contents. Place on a firm, flat, level surface at least 12 inches from walls.

1. Remove all packaging materials from the humidifier and tank.
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 tap water up to the MAX line. Replace cap securely.
4. Place tank on base: Align tank with base and set down gently. Ensure it is seated properly.
5. Plug into a 120V AC electrical outlet.

WARNING! Use only cool tap or distilled water. Do not use hot water, additives, or oils. Ensure unit is on a stable, waterproof surface.

First-Time Use

Power on humidifier; adjust settings as needed.

1. Turn the Humidity Control dial to the desired setting (LOW, MEDIUM, HIGH).
2. Adjust the 360-degree mist outlet to direct moisture away from walls and furniture.
3. The unit will begin producing a cool mist. The refill light will be off when the tank has water.
4. For quiet operation at night, set the dial to LOW.

CAUTION! Never operate the humidifier without the wick filter properly installed. Do not block the mist outlet.

Specifications

• Model: HE420A
• Tank Capacity: 4 gallons (15.1 liters)
• Room Coverage: Up to 700 square feet
• Run Time: Up to 24 hours on low setting
• Output: Up to 1.5 gallons per day
• Power Source: 120V AC, 60Hz
• Power Consumption: 30W (max)
• Noise Level: < 35 dB on quiet mode
• Dimensions (LxWxH): 15.5" x 11.5" x 19.5"
• Weight (Empty): 8.5 lbs
• Filter Type: Replaceable wick filter (Part # HEWF60)

Controls and Operation

Control Panel located on the front of the base unit.

Main Controls: Humidity Control Dial (Off / Low / Medium / High), 360-Degree Mist Nozzle (manual rotation).

Indicator Lights: Refill Indicator (glows red when tank is empty), Filter Change Reminder (based on usage time).

Operation: Turn dial to start. Adjust mist output and direction as needed. The unit will run until the tank is empty or turned off. The auto shut-off will activate if the tank is removed or runs dry.

Maintenance & Cleaning

Regular cleaning prevents mold and mineral buildup. Clean every 1-2 weeks during use.

1. Unplug the unit from the electrical outlet.
2. Empty any remaining water from the tank and base.
3. Clean Tank: Fill tank with 1 quart of white vinegar and cool water. Swirl, then let sit for 20 minutes. Scrub interior with a soft brush. Rinse thoroughly.
4. Clean Base: Wipe the base reservoir with a cloth dampened with a 50/50 vinegar-water solution. Do not submerge the base in water.
5. Rinse & Dry: Rinse all parts with clean water and allow to air dry completely before reassembly.

Tip: Using distilled water can reduce mineral deposits and cleaning frequency.

Filter Replacement

The wick filter should be replaced every 1-3 months, or when visibly scaled or discolored.

1. Unplug the unit and remove the water tank.
2. Remove the old wick filter from the base frame.
3. Soak the new filter in cool water for 15-20 minutes.
4. Insert the new, soaked filter into the frame, ensuring it sits flat.
5. Reassemble the tank and base. Reset the filter change reminder if applicable.

WARNING! Never operate the humidifier without a filter. Use only genuine Honeywell replacement filters (HEWF60) for optimal performance and safety.

Safety Features

Auto Shut-Off: Turns off unit when tank is empty or improperly seated. Tip-Over Protection: Internal switch stops operation if unit is tipped over. Cool Mist Technology: Produces room-temperature mist, safe around children and pets.

Care & Storage

When not in use for extended periods, prepare the unit for storage.

1. Unplug the unit.
2. Empty and thoroughly clean the tank and base as described in the cleaning section.
3. Remove and discard the old wick filter.
4. Allow all parts to air dry completely.
5. Reassemble the unit without a filter and store in the original box in a cool, dry place.
6. Install a new filter when ready to use again.

CAUTION! Never store the unit with water in the tank or base, as this can promote mold and bacterial growth.

Regulatory Information

This humidifier 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, visit www.honeywellhumidifiers.com or contact 1-800-332-1110.

Troubleshooting

Reset: Unplug unit for 5 minutes, then plug back in.

Service: 1-800-332-1110; www.honeywellhumidifiers.com