homedics ultrasonic cool mist humidifier manual
Product Overview
The Homedics ultrasonic cool mist humidifier delivers gentle mist, UV‑C sterilization, and a 2‑year limited warranty. It auto‑adjusts output based on room humidity, supports warm or cool mist, and works only with included essential‑oil pads—do not leave pads unused for long for bedroom.nightly!.

Key Features
• Ultra‑silent operation at <30 dB, ideal for bedrooms and offices.
• Dual mist mode: cool mist for summer, warm mist for winter (heat‑free).
• Built‑in UV‑C lamp (254 nm) sterilizes water and eliminates up to 99.9 % of airborne bacteria and mold spores.
• Smart humidity sensor automatically adjusts mist output; displays real‑time RH on the digital panel.
• 4‑hour auto‑off timer and night‑light mode with soft amber glow.
• 1.5 L water capacity with a removable, dishwasher‑safe reservoir.
• Integrated essential‑oil pad holder (Homedics pads only) for aromatherapy; pad must be replaced or re‑moistened every 3 days.
• Easy‑clean design: all parts are detachable and fit in the dishwasher; no need for chemical cleaners.
• 2‑year limited warranty covers manufacturing defects and UV‑C lamp failure.
• Energy‑efficient 0.5 W power consumption; complies with ENERGY STAR guidelines.
• Safety features: automatic shut‑off when water level is low, overheat protection, and a child‑safe lock for the lid.

Model Variations and Specifications
Model 1714078 (UHE‑CM18) – 17.1 in tall, 6.8 in wide, 6.5 in deep, 5.2 lb. 1.5 L water tank, 0.5 W power, 30 dB noise, 4 hr auto‑off, 2‑year limited warranty. Model 1714078‑W (UHE‑WM130) – identical dimensions, 0.6 W power, 30 dB noise, 4 hr auto‑off, 2‑year warranty. Both share a 2.5 in LCD, 3‑speed fan, 1.5 L capacity, 30 dB, 4‑hr auto‑off, 2‑year warranty. Device is CE, UL, FCC certified. Reservoir: detachable, dishwasher safe, BPA‑free polypropylene, 1.5 L. Power: 12 V AC, 0.5–0.6 W. Max mist output: 1.5 L/h. Dimensions: 6.8 in × 6.5 in × 17.1 in. Weight: 5.2 lb. LED display: power, mist mode, timer status. Warranty: 2 years on housing, 2 years on UV‑C lamp.
| Model | Dimensions (W×D×H) | Weight | Capacity | Power | Noise | Max Mist | Warranty | Certifications |
|---|---|---|---|---|---|---|---|---|
| 1714078 (UHE‑CM18) | 6.8 in × 6.5 in × 17.1 in | 5.2 lb | 1.5 L | 0.5 W | 30 dB | 1.5 L/h | 2 yrs | CE, UL, FCC |
| 1714078‑W (UHE‑WM130) | 6.8 in × 6.5 in × 17.1 in | 5.2 lb | 1.5 L | 0.6 W | 30 dB | 1.5 L/h | 2 yrs | CE, UL, FCC |
- 12 V AC adapter (included)
- 1.5 L water reservoir (detachable, dishwasher safe)
- Optional filter cartridge (not included)

Unboxing and Initial Setup
Begin by opening the sealed carton. Inside, you’ll find the humidifier body, a detachable 1.5‑L water reservoir, a 12‑V AC adapter, a USB charging cable, a user manual, a warranty card. The reservoir is made of BPA‑free polypropylene and is dishwasher safe. The humidifier’s base is a non‑slip rubber pad. Carefully remove the protective film from the LCD display and the mist nozzle.
Place the unit on a flat, stable surface. Insert the reservoir, aligning the inlet with the water feed. Fill with room‑temperature tap water up to the maximum line; avoid using distilled water unless you prefer a longer lamp life. Attach the reservoir by sliding it into place until it clicks. Connect the 12‑V adapter to the wall outlet and plug the other end into the humidifier’s power port. The LED will illuminate, indicating power.
Press the power button to turn on the device. The LCD will display “ON” and the current mist mode. Use the mode button to toggle between cool mist, warm mist, and auto‑humidity adjustment. The auto‑mode will display “AUTO” and adjust mist output based on room humidity. If you wish to use essential oils, place a single Homedics‑included oil pad into the aromatherapy tray. Do not leave an oil pad unused for extended periods.
Set the timer by pressing the timer button until the desired duration appears on the display. The humidifier will automatically shut off after the set time. Finally, check the UV‑C lamp indicator; if the lamp is active, a green light will appear. If the lamp is inactive, a red light will indicate it needs replacement. Once all settings are confirmed, the device is ready for use.
Keep the reservoir clean by rinsing with distilled water every 48 hours. Replace water daily if cloudy. Replace the UV‑C lamp after 12 months or if the indicator turns red. unit heat sources!!

Operating Modes and Controls
Controls are on the front panel. The Power button turns the unit on or off. The Mode button cycles through Cool, Warm, and Auto‑Humidity modes, with an LED indicator now. The Humidity button toggles Auto‑Humidity; a green light shows it’s active. The Timer button sets a 1‑ to 12‑hour timer; the display counts down when activated. The Fan Speed button adjusts fan speed for Warm mode (Low, Medium, High). The UV‑C Light button turns the sterilization lamp on or off; a red light means off, green means on. The unit’s sleek design features a removable water tank, built‑in timer, and child‑lock for safety, ideal for home and office use!
The Homedics ultrasonic cool mist humidifier offers three modes: Cool Mist, Warm Mist, and Auto‑Humidity Adjustment. Cool Mist produces a fine room‑temperature mist, ideal for bedrooms and offices. Warm Mist heats water to gentle steam, providing a soothing atmosphere during cold weather. In Auto‑Humidity mode, the built‑in sensor continuously monitors room humidity and automatically modulates mist output to maintain a set level. The LCD display shows the current mode, humidity percentage, and timer status.

For essential‑oil users, the Aromatherapy button activates the pad tray, letting the humidifier disperse fragrance. The unit reduces mist output when an oil pad is inserted to avoid excess moisture. Controls are intuitive, with icons and a backlit display for low‑light use. A child‑lock disables all buttons except Power when engaged.

Maintenance and Cleaning
Daily cleaning keeps the Homedics ultrasonic humidifier running smoothly. First, turn off the unit and unplug it. Remove the water tank, rinse it with clean water, and let it air‑dry. Then wipe the mist chamber and the outer surface with a soft, damp cloth. Avoid using abrasive cleaners or solvents, which can damage the silicone lining.
Every 2–3 days, perform a deeper clean. Fill the tank with a 1:1 mixture of distilled water and white vinegar. Let the mixture run for 30 minutes, then turn off the unit and let the solution sit for 15 minutes before draining and rinsing thoroughly. This routine ensures mineral buildup is removed and bacteria are eliminated from the humidifier’s internal components.
When using essential‑oil pads, clean the pad tray after each use. Remove any residual oil with a mild soap solution, rinse, and dry completely before reassembling. The pad tray should also be inspected for cracks or wear, and replaced if necessary. Regular maintenance extends the life of the UV‑C lamp and ensures optimal mist quality.
To protect the UV‑C lamp, replace the bulb every 12 months or when the indicator light turns amber. Store the unit in a dry place when not in use. Periodically inspect the water reservoir for scale buildup; if mineral deposits appear, clean with a soft brush and rinse thoroughly. Keep the outer housing free of dust by wiping with a damp cloth. These simple steps ensure the humidifier delivers clean mist and maintains.

Troubleshooting Common Issues
When the humidifier fails to produce mist, first check that the water tank is filled to the indicated level and that the lid is securely closed. If mist still does not appear, clean the ultrasonic plate and the water inlet with a soft brush and a vinegar solution to remove mineral deposits that may block the ultrasonic vibration.
Low mist output often results from a partially clogged water reservoir. Remove the tank, rinse thoroughly, and inspect the inlet filter. Replace the filter if it appears dirty or damaged; A clogged filter can restrict water flow and reduce mist volume.
If the UV‑C lamp stops lighting, ensure the lamp is properly seated in its socket. The lamp should be replaced every 12 months or when the indicator light turns amber. A faulty lamp will also trigger an error code on the display refer to the error code list in the manual for spec. action.
When the automatic humidity adjustment mode does not activate, verify that the humidity sensor is clean and unobstructed. Dust or mineral buildup on the sensor can cause incorrect readings, preventing the unit from switching to auto mode. Clean the sensor with a dry cloth.
Persistent error codes such as “E1” or “E2” usually indicate a water level issue or a sensor fault. Reset the unit by turning it off, unplugging it for 30 seconds, and then powering it back on. If the error persists, contact Homedics customer support or refer to the warranty service page.
When the humidifier fails to produce mist, first check that the water tank is filled to the indicated level and that the lid is securely closed. If mist still does not appear, clean the ultrasonic plate and the water inlet with a soft brush and a vinegar solution to remove mineral deposits that may block the ultrasonic vibration.
Low mist output often results from a partially clogged water reservoir. Remove the tank, rinse thoroughly, and inspect the inlet filter. Replace the filter if it appears dirty or damaged. A clogged filter can restrict water flow and reduce mist volume.
If the UV‑C lamp stops lighting, ensure the lamp is properly seated in its socket. The lamp should be replaced every 12 months or when the indicator light turns amber. A faulty lamp will also trigger an error code on the display refer to the error code list in the manual for spec. action.
Persistent error codes such as “E1” or “E2” usually indicate a water level issue or a sensor fault. Reset the unit by turning it off, unplugging it for 30 seconds, and then powering it back on. If the error persists, contact Homedics customer support or refer to the warranty service page.
Safe.

Warranty and Registration
The Homedics Ultrasonic Cool Mist Humidifier comes with a comprehensive 2‑year limited warranty covering manufacturing defects and component failures. The warranty period begins on the date of purchase and is valid for the original owner only. To activate the warranty, register your unit online at www.homedics.com/register. Registration must be completed within 30 days of purchase; failure to register will void the warranty.
Warranty coverage includes replacement or repair of the ultrasonic plate, UV‑C lamp, water tank, and electronic control board. Parts that are damaged due to accidental drops, misuse, or exposure to excessive moisture are excluded. The warranty does not cover normal wear and tear, such as the essential‑oil pads, which must be replaced as needed.
To file a claim contact Homedics Customer Service. Provide proof of purchase a description of the defect. Homedics will guide you through the return shipping process. If the unit is deemed defective it will be repaired at cost to the customer. Shipping charges for return and replacement are covered by Homedics only if the defect is covered by the warranty.
Keep the original receipt and registration confirmation in a safe place, as they are required for warranty claims. Homedics reserves the right to modify warranty terms or discontinue the warranty program at any time, but will provide notice through the website or email communication.

Frequently Asked Questions
Q: How long does the UV‑C lamp last? A: Approximately 12 months or 1,200 hours. Q: Can I use it with tap water? A: Yes, but mineral buildup may occur; clean weekly. Q: Does it produce noise? A: Minimal, <2 dB, barely audible. Q: Is it safe around pets? A: Yes, keep out of reach. Visit help now!!??
Cleaning Instructions
Follow these steps to keep your Homedics ultrasonic cool mist humidifier running smoothly and hygienically. Frequency: Clean the unit at least once a week, or more often if you use it daily or in a dusty environment.
- Turn off and unplug. Let the device cool completely before opening the reservoir.
- Remove the water tank. Empty any remaining water rinse the tank with warm, soapy water. Rinse thoroughly to remove soap residue.
- Clean the mist nozzle. Use a soft brush or cotton swab to dislodge mineral deposits. A small amount of white vinegar can help dissolve buildup.
- Wipe the interior. Dampen a clean cloth with a mild detergent solution and wipe the inside of the tank and the base. Avoid using abrasive cleaners.
- Dry completely. Shake out water and let parts dry before reassembling.
- Essential‑oil pad care. Remove the pad after each use. If it becomes saturated, replace it with a fresh pad. Do not leave a used pad in the reservoir for extended periods.
- UV‑C lamp maintenance. Inspect the lamp for dust accumulation. Gently wipe with a dry microfiber cloth.
- Reassemble and test. Once everything is dry, reattach the tank, plug in, and run a short cycle to ensure proper operation.
Regular cleaning reduces mineral scaling, prevents mold growth, and extends the life of the ultrasonic transducer and UV‑C lamp.
Replacement Parts and Accessories
For optimal performance, the Homedics ultrasonic cool mist humidifier offers a range of replacement components and complementary accessories. The most common parts that may need replacement over time include the ultrasonic transducer, the UV‑C lamp, the water reservoir lid, and the essential‑oil pad holder. Each part is designed for easy removal and insertion, allowing users to refresh the unit without professional help.
Replacement transducers are available in the same model series and can be purchased directly from Homedics or authorized retailers. They feature identical dimensions and output specifications, ensuring a seamless fit. The UV‑C lamp, which provides sterilization of the mist, typically lasts 12–18 months of regular use; a new lamp can be installed by unscrewing the existing unit and threading the new one into place.
Water reservoir lids are made of durable, BPA‑free plastic and can be replaced if cracks or warping appear. The essential‑oil pad holder, which secures the pads in the aroma chamber, can also be swapped out for upgraded versions that support a wider variety of pad sizes.
Additional accessories include:
- Essential‑oil pads – available in various scents; use only those supplied with the humidifier to maintain safety.
- Cleaning kit – a soft brush, microfiber cloth, and mild detergent for routine maintenance.
- Portable travel case – protects the unit during transport.
- Extended warranty card – can be added to the original 2‑year limited warranty for extra coverage.
All replacement parts and accessories can be ordered through the Homedics website or through certified distributors. Always verify the part number against your model identifier (e.g., 1714078) to ensure compatibility. Proper replacement and timely maintenance help maintain the humidifier’s efficiency and prolong its lifespan.
Using Essential Oil Pads
To enhance the ambient atmosphere, the Homedics ultrasonic cool mist humidifier is designed to work exclusively with the manufacturer’s essential‑oil pads. Before inserting a pad, ensure the humidifier is powered off and the water reservoir is empty. Place the pad into the aroma chamber, aligning the notch with the slot; the pad should sit snugly without forcing it. The pad’s absorbent core will release fragrance as the mist passes through, creating a subtle scent that blends with the humidified air.
When selecting a fragrance, choose from the range of Homedics pads that match your desired aroma. Do not use third‑party or homemade pads, as they may contain oils that can damage the UV‑C lamp or clog the ultrasonic transducer. If a pad becomes saturated, replace it promptly; a soaked pad can reduce mist output and may cause excess moisture buildup inside the unit.
After each use, remove the pad and allow the aroma chamber to dry completely before inserting a new pad. Avoid storing used pads in the chamber for extended periods, as residual oils can accumulate and affect the humidifier’s efficiency. For best results, clean the aroma chamber with a damp cloth and mild soap, rinsing thoroughly to remove any oil residue. Ensure the chamber is fully dry before re‑introducing a new pad. If you notice any discoloration or mold growth, discontinue use of the pad and replace the chamber with a new one from the Homedics supply kit. Keep pads fresh now.
Automatic Humidity Adjustment
The Homedics ultrasonic cool mist humidifier features a built‑in humidity sensor that continuously monitors the room’s relative humidity (RH). When RH drops below the user‑selected threshold—typically set between 30 % and 70 %—the unit automatically increases mist output to raise moisture levels. Conversely, if RH rises above the threshold, the humidifier reduces or pauses mist production to prevent excess dampness, maintaining a stable indoor climate without manual intervention. Users can toggle the auto‑mode on or off by pressing the dedicated button on the front panel; an LED indicator confirms the current state. The sensor’s accuracy is preserved through periodic calibration, which the device performs automatically during startup. For optimal performance, keep the sensor’s surface clean and free from dust or mineral buildup. The auto‑mode also works in tandem with the UVC sterilization feature, providing both clean mist and a sanitized environment. When the humidifier is in auto‑mode, the digital display shows the current RH and the target RH setpoint, allowing users to monitor adjustments in real time. The system’s firmware prioritizes energy efficiency, cycling the ultrasonic transducer only as needed, which can extend battery life in portable models. By using this intelligent humidity control, users can enjoy consistent comfort all day and night, while protecting furniture and electronics from dry‑air damage.
UV‑C Light Operation
The Homedics ultrasonic cool mist humidifier is equipped with a built‑in UV‑C lamp that actively sterilizes the water reservoir and mist output. The lamp is powered by a low‑voltage, energy‑efficient circuit and is designed to emit a wavelength of 254 nm, which is proven to inactivate bacteria, viruses, and mold spores. When the unit is turned on, the UV‑C lamp automatically activates after a brief pre‑heat period, ensuring that the mist remains free of microbial contamination throughout the operating cycle. The lamp’s lifespan is rated for approximately 12,000 hours of use, after which it should be replaced to maintain optimal sterilization performance. Replacement lamps are available through the official Homedics service network and are compatible with all models featuring UV‑C technology. For safety, the lamp is enclosed within a protective housing that prevents direct exposure to the user; however, it is recommended to keep the unit out of reach of children and pets. The lamp’s power consumption is minimal, adding only a few watts to the overall energy draw of the humidifier. Users can monitor the lamp’s status via the digital display, which shows a “UV‑C ON” indicator when the lamp is active. If the lamp fails or reaches the end of its service life, the display will flash a warning, and the unit will automatically shut down to prevent operation without sterilization. Regular cleaning of the reservoir and the lamp’s housing with a soft, damp cloth will help maintain optimal performance and extend the lamp’s effective life. The UV‑C feature is an integral part of the device’s health‑focused design, providing a clean, allergen‑free environment for users who value both comfort and hygiene.
In addition, the UV‑C lamp is compliant with FCC and CE safety standards, ensuring that electromagnetic emissions remain well below regulatory limits. The device also incorporates a built‑in safety switch that detects any abnormal voltage spikes and immediately deactivates the lamp to protect users. To replace the lamp, first unplug the unit, open the rear panel, and gently remove the old lamp using the provided clip. Insert the new lamp, re‑attach the clip, and close the panel. The unit will automatically recognize the new lamp and resume sterilization. Users should not attempt to replace the lamp while the unit is powered on, as this could damage the lamp or the control circuitry. The UV‑C lamp’s protective housing is made of clear polycarbonate, allowing users to visually confirm that the lamp is functioning without compromising safety. Finally, the lamp’s operation is fully integrated with the humidity‑sensing system; if the humidity reaches the user‑set threshold, the lamp remains on to ensure that any mist produced is immediately sterilized, thereby maintaining a consistently clean environment.
