HoMedics UHE-CM18 Has No Power or No Mist
The manual starts with plug/power, low water, and the ultrasonic membrane. A dirty membrane can cause reduced or no mist.
VERIFIED MODEL HUB · 5 EXACT GUIDES
HoMedics UHE-CM18 troubleshooting
TotalComfort cool-mist ultrasonic humidifier with a 60-hour clean reminder, red out-of-water light, and a dedicated Clean-button reset.
Humidifier type
ultrasonic
ultrasonic
What should you see?
Visible mist is expected while mist output is active.
Visible mist is expected while mist output is active.
Exact issue guides
Choose the observed symptom, light, code, app state, or output problem.
HoMedics UHE-CM18 Clean Light Will Not Turn Off
On the UHE-CM18, clean the ultrasonic membrane first, then press and hold the Clean button for three seconds to reset the reminder.
HoMedics UHE-CM18 Red Water Light Is On
The red power/out-of-water light means the tank is almost empty and the humidifying function has shut off.
HoMedics UHE-CM18 Is Leaving White Dust
Hard-water minerals can leave white dust around this ultrasonic model. HoMedics recommends a demineralization cartridge and distilled water when needed.
HoMedics UHE-CM18 Is Making Excessive Noise
The UHE-CM18 troubleshooting table points first to an uneven surface or a low water level.
HoMedics UHE-CM18 at a glance
| Fact | Detail |
|---|---|
| Humidifier type | ultrasonic |
| What you should see | Visible mist is expected while mist output is active. |
| Model / SKU identifiers | Not listed |
| Exact guides published | 5 |
| Latest linked-guide review | September 4, 2026 |
| Official sources | HoMedics UHE-CM18 product page; HoMedics UHE-CM18 instruction manual |
Which guide matches your symptom
Each row is one exact-model guide; the short answer is the same one shown on the guide.
| Symptom | Short answer | Guide |
|---|---|---|
| No power / no mist | The manual starts with plug/power, low water, and the ultrasonic membrane. A dirty membrane can cause reduced or no mist. | HoMedics UHE-CM18 Has No Power or No Mist |
| Clean light stays red | On the UHE-CM18, clean the ultrasonic membrane first, then press and hold the Clean button for three seconds to reset the reminder. | HoMedics UHE-CM18 Clean Light Will Not Turn Off |
| Red out-of-water light | The red power/out-of-water light means the tank is almost empty and the humidifying function has shut off. | HoMedics UHE-CM18 Red Water Light Is On |
| White dust | Hard-water minerals can leave white dust around this ultrasonic model. HoMedics recommends a demineralization cartridge and distilled water when needed. | HoMedics UHE-CM18 Is Leaving White Dust |
| Excessive noise | The UHE-CM18 troubleshooting table points first to an uneven surface or a low water level. | HoMedics UHE-CM18 Is Making Excessive Noise |