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TROUBLESHOOTING
PROBLEM
No power/no mist
from spout
Peculiar odor
Excessive noise
White dust
accumulation
Red light
illuminates on the
Clean indicator/
reset button
POSSIBLE CAUSE
• 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
• Water outlet valve
needs cleaning
• Unit is new
• If unit is in use, the
odor may be a dirty
tank or old water in
the tank and water
reservoir.
• Unit is not level
• Low water level
• Hard water used
• Demineralization
cartridge needs to be
replaced
• Transducer/Ultrasonic
Membrane needs
cleaning
• Clean reminder needs
to be reset
SOLUTION
• 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 How to clean and care section
• Reset the humidistat to a higher humidity
setting, or change to continuous on
• Follow steps 1-7, Cleaning the
Transducer/Ultrasonic Membrane in the
How to Clean and Care Section
• Remove the tank cover and let the tank
air out in a cool, dry place for 12 hours
• Remove the tank cover and tank. Pour
out any water remaining in the tank.
Over a sink, twist to remove the water
reservoir and pour out any remaining
water. Reassemble and fill with clean,
cool water.
• Place unit on a flat, even surface.
• Check the water level; refill the tank if
the water is low
• Use distilled water and a
demineralization cartridge
• Replace demineralization cartridge
• Follow Cleaning the Transducer/
Ultrasonic Membrane instructions in
the How to Clean and Care section
• After filling the tank with water, press
and hold the clean indicator/reset
button until the red LED turns off
12
- Quick Links:
- Control Panel
- How to Operate
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Need help?
Do you have a question about the CMTF91 and is the answer not in the manual?
Questions and answers
I **** getting a CO code in the digital display
There is water leaking from the bottom of the humidifier.
Water may be leaking from the bottom of the HoMedics CMTF91 humidifier if it is placed on an uneven or unstable surface, or if it is on a material that can be damaged by moisture. It is recommended to place a waterproof base under the humidifier. Additionally, ensure that the water tank is properly seated on the base and that there are no cracks or damages in the tank.
This answer is automatically generated
CO code showing. What to do.
The humidifier is on but doesn't run.
The HoMedics CMTF91 humidifier may be on but not running due to one or more of the following reasons:
1. Low Water Level: The water tank may be empty or below the required level. Refill the tank if needed.
2. Dirty Ultrasonic Membrane: The transducer or ultrasonic membrane may be dirty. Clean it with a 50/50 solution of white vinegar and water.
3. Humidity Setting Too Low: The humidistat may be set below the current room humidity. Raise the setting or switch to continuous mode.
4. Old Water or Dirty Tank: Old or stagnant water can affect operation. Empty, clean, and refill the tank with fresh water.
5. Red Light Indicator: If the red light is on, reset it by holding the clean indicator button for 3 seconds.
Check and address each of these steps to restore proper operation.
This answer is automatically generated