Name: Manual for UHE-CMTF91 - Troubleshooting and error codes + PDF Download
Brand: HOMEDICS

Manual for UHE-CMTF91 - Troubleshooting and error codes + PDF Download

Brand: HOMEDICS

Category: Humidifier

Manual Type:

Language:

Uploaded: April 8, 2025, 1:55 p.m.

Manual Publish Date: 2021

Warranty Summary

HoMedics provides a 2-year limited warranty against defects in manufacture and workmanship under normal use and service.

To Use the Humidifier:

Plug the unit into a 120-volt AC outlet.
Press the power button to turn the unit on.
Adjust the mist output level using the mist output button.
Rotate the mist nozzle to direct the mist.
Use the timer button to set an auto-off time if desired.
The night-light feature can be activated with the night-light button.

Filling the Tank:

Turn off and unplug the unit before filling.
Remove the tank cover.
Fill the tank with clean, cool water up to the MAX fill line.
Replace the tank cover.

Troubleshooting and error codes

Problem	Possible Cause	Solution
No power/no mist from spout	Unit is not plugged in Unit is not turned on No power at unit Low water level Transducer/ultrasonic membrane needs cleaning Humidistat set lower than the current room humidity	Plug unit in Press the power button to turn the unit on Check circuits and fuses or try a different outlet Refill the tank with water Follow Cleaning the Transducer/Ultrasonic Membrane instructions in the Cleaning and Care section Reset the humidistat to a higher humidity setting, or change to continuous on
Peculiar odor	Unit is new If unit is in use, the odor may be a dirty tank or old tank water Old water in water reservoir	Remove the tank cover and let the tank air out in a cool, dry place for 12 hours Empty the old water, clean the tank, and fill with clean water Remove the tank cover and tank. Pour out any remaining water in the water reservoir
Excessive noise	Unit is not level Low water level	Place unit on a flat, even surface Check the water level; refill the tank if the water is low
White dust accumulation	Hard water used Demineralization cartridge needs to be replaced	Use distilled water and a demineralization cartridge Replace demineralization cartridge
Red light illuminates on the Clean indicator/reset button	Transducer/Ultrasonic Membrane needs cleaning Clean reminder needs to be reset	Follow Cleaning the Transducer/ Ultrasonic Membrane instructions in the Cleaning and Care section Press and hold the clean indicator/reset button until the red LED turns off

Troubleshooting and error codes

Problem	Possible Cause	Solution
No power/no mist from spout	Unit is not plugged in Unit is not turned on No power at unit Low water level Transducer/ultrasonic membrane needs cleaning Humidistat set lower than the current room humidity	Plug unit in Press the power button to turn the unit on Check circuits and fuses or try a different outlet Refill the tank with water Follow Cleaning the Transducer/Ultrasonic Membrane instructions in the Cleaning and Care section Reset the humidistat to a higher humidity setting, or change to continuous on
Peculiar odor	Unit is new If unit is in use, the odor may be a dirty tank or old tank water Old water in water reservoir	Remove the tank cover and let the tank air out in a cool, dry place for 12 hours Empty the old water, clean the tank, and fill with clean water Remove the tank cover and tank. Pour out any remaining water in the water reservoir
Excessive noise	Unit is not level Low water level	Place unit on a flat, even surface Check the water level; refill the tank if the water is low
White dust accumulation	Hard water used Demineralization cartridge needs to be replaced	Use distilled water and a demineralization cartridge Replace demineralization cartridge
Red light illuminates on the Clean indicator/reset button	Transducer/Ultrasonic Membrane needs cleaning Clean reminder needs to be reset	Follow Cleaning the Transducer/ Ultrasonic Membrane instructions in the Cleaning and Care section Press and hold the clean indicator/reset button until the red LED turns off