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READ AND SAVE THESE INSTRUCTIONS

Thank you for purchasing the Vicks ComfortFlex Digital Thermometer with SpeedRead™ technology, large screen display and Fever InSight feature, a 

professionally accurate instrument for faster and easier temperature taking. Please read these instructions carefully to ensure accurate temperatures and 

safe operation. When used properly, this high quality product will give you years of accurate, dependable service.

IMPORTANT SAFETY INFORMATION

   High, prolonged fever requires medical attention especially for young children. Please contact your physician.

  Do not allow children to take their temperatures unattended.

  Do not allow children to walk or run during temperature taking.
If you have any questions or comments about the Vicks ComfortFlex Digital Thermometer, call our toll-free Consumer 

Relations Line: 1-800-477-0457 or e-mail [email protected].

CHANGING THE DISPLAY FROM FAHRENHEIT (F) OR CENTIGRADE (C):

With the thermometer in the OFF position, hold down the center button until the display shows Lo.  Release the button. To choose desired scale, press 

the button again to move between the “F” or “C” icon shown below the Lo. Once the “C” or “F” starts to blink, push the button again to turn off the 

thermometer. You can now turn on the thermometer and the display will be in Fahrenheit (F) or Centigrade (C) based on the scale you set in the above 

steps. Your thermometer will return to Fahrenheit (F) readings when you replace your battery.  You can repeat this process to switch to Centigrade (C).

TEMPERATURE READINGS

Temperature readings vary from person to person. Although there is no one “normal” temperature reading, a temperature, taken orally, ranging between 

97°F and 100°F is considered normal. A rectal temperature is generally 1° higher and an underarm (axillary) temperature will be 1° lower.
The best method to determine your own normal temperature is to use the thermometer when you are feeling well. Record your reading twice a day (early 

morning and late afternoon). Take the average of the two temperatures. This is considered your normal body temperature. Any variation from it may 

indicate some sort of illness and you should consult your physician.

BEFORE USE

Your Vicks ComfortFlex Digital Thermometer is a 3-in-1 thermometer for oral, rectal, or underarm use. Whichever method is used, it is 

recommended that for 15 minutes prior to use, avoid eating or drinking any liquids, exercising, taking showers or baths, or smoking.

PROBE COVERS

Disposable probe covers are provided with your Vicks ComfortFlex Digital Thermometer. Place a cover on the  

probe tip each time the thermometer is used to help prevent spread of germs. Additional probe covers can be  

purchased at most drug stores or pharmacy departments.

OPERATING YOUR VICKS COMFORTFLEX DIGITAL THERMOMETER

1.   TURNING THE UNIT ON

 

1.   Turn unit on by pressing the On/Off button (Fig. 1).

 

2.   A beep will sound and the display will flash Red/Yellow/Green for 1 second.

 

3.   Wait for unit to get ready

 

 

– The display will perform a self-test (Fig. 2).

 

 

– The display will show last measurement for 2 seconds (Fig. 3).

 

 

– After about 5 seconds, the display will show it’s ready (Fig. 4).

2.   SELECTING A TEMPERATIRE LOCATION

 

Oral Use

 

1.   It is suggested to use a probe cover for Oral Use to prevent the spread of germs. Discard the probe 

cover after taking a temperature.

 

2.   Place the thermometer under the tongue. It is important to place the tip of the thermometer well  

under the tongue to get a good, accurate reading. (Fig. 5) Place sensor tip in areas marked with “

”. 

Keep mouth closed and sit still to help ensure an accurate measurement.

 

3.   When the peak temperature is reached (usually 9 seconds), 5 beep signals will sound and the 

“°F” sign will stop flashing. The temperature is now ready to read and will not change when the 

thermometer is removed.

 

4.   Dispose of used probe cover and wash the thermometer as recommended.

 

Under-the-arm (Axillary) Use

 

This method is used for babies and young children.

 

1.   Wipe the underarm with a towel.

 

2.   Place the probe tip under the arm so the tip is touching the skin and position your arm next to your 

body (Fig. 6) . With a young child, it is sometimes helpful to hug the child to keep their arm next to 

their body. This ensures that the room air does not affect the reading.

 

3.   When the peak temperature is reached (usually 11 seconds), 5 beep signals will sound and the 

“°F” sign will stop flashing. The temperature is now ready to read and will not change when the 

thermometer is removed.

  Note: This method produces a temperature 1° lower than a temperature taken orally.

 

4.  Clean the thermometer as recommended.

 

Rectal Use

 

Commonly used for babies, young children, or when it is difficult to take an oral or underarm temperature.

 

1.   Cover the thermometer’s tip with a probe cover and lubricate with a water-soluble jelly for easier 

insertion. Do not use petroleum jelly. Read the label of the lubricant to be sure you are using the  

right kind.

 

2.   Lay the patient on his/her side. If the patient is an infant, the proper position for a baby is to lay on its stomach with legs hanging down, either 

across your knees or at the edge of a bed or changing table. This positions the infant’s rectum for safe and easy insertion of the thermometer.

 

3.   Gently insert the tip of the thermometer NO MORE THAN 1/2 inch into the rectum. If you detect resistance, stop.  Hold the thermometer in place 

during measurement.

 

4.   When the peak temperature is reached (usually 10 seconds) 5 beep signals will sound and the “°F” sign will stop flashing. The temperature is 

now ready to read and will not change when the thermometer is removed.

  Note: This method produces a temperature 1° higher than a temperature taken orally.

 

5.   Dispose of used probe cover and wash the thermometer as recommended.

3.  

FEVER INSIGHT FEATURE

 

 Fever InSight helps you to better understand the meaning of your child’s  

temperature with the color indicated on the display. The screen displays  

Green if no fever, Yellow when the temperature is slightly elevated and a  

Red alert for fever.

4.   TURNING THE UNIT OFF

 

 Turn the thermometer off by pressing the On/Off button. If you forget to turn it off, the thermometer will automatically turn off after approximately  

1 1/2 minutes.

CARE AND CLEANING

1.   Clean the probe tip by washing with soap and warm water or by disinfecting with rubbing alcohol (70% isopropyl alcohol).

2.   Wipe dry with soft cloth.

3.   DO NOT BOIL OR CLEAN IN DISHWASHER. This will cause the thermometer to no longer function and will void the warranty.

4.   Do not wash the unit with any thinner or chemical solvent.

CHANGING THE BATTERIES

The Vicks ComfortFlex Digital Thermometer features a long life battery. When the “ ” appears and flashes in the center top of the display, the battery is 

exhausted and needs replacing.

1.   Using a coin, unlock the battery cover and carefully remove the battery with a non-metallic instrument.

2.   Replace the battery with a 3V, CR1225 silver oxide type or equivalent. Insert the new battery with the positive (+) side facing the battery cover.

3.   Carefully replace the battery cover and, using a coin, tighten the cover.

SPECIFICATIONS

Battery Life:    

 More than 300 measurements or approximately 2 years if used every other day.

Temperature Range:  

 89.6-109.2°F. If less than 89.6°F, “Lo” is displayed. If more than 109.2°F, “Hi” is displayed.

“BPA Free” Implies: 

1. Plastics used to make the thermometer are BPA Free

 

 

 

 

2. A comprehensive audit to ensure a BPA Free process

 

 

 

 

3. A screening test based on acceptance criteria

Beeper:   

 

 Unit will beep for approximately 8 seconds when peak temperature is reached. For temperatures over 101.0°F, the audible 

Fever Signal will sound 5 times.

Error Messages:  

 The display will read “Err” when a malfunction occurs and the unit will power off after 1 minute.

Accuracy in Water-bath:  

 +/-0.2°F between 96.0-107.0°F at room temperature of 71°F.

TEST PROTOCOL 

(Laboratory use only)

1.   Place thermometer into a stable liquid bath with a temperature set above 95°F. The tip of the thermometer should be approximately 0.8 inches (2cm)  

 

below the surface.

2.   Wait for 10 seconds, then turn thermometer on by pressing the blue “On / Off” button.

3.   When the measurement is completed (approximately 8 seconds), record the temperature reading.

1 YEAR LIMITED WARRANTY

You should first read all Instructions before attempting to use this product.

A.  This 1 year limited warranty applies to repair or replacement of product found to be defective in material or workmanship.  This warranty does not 

apply to damage resulting from commercial, abusive, unreasonable use or supplemental damage.  Defects that are the result of normal wear and tear will 

not be considered manufacturing defects under this warranty. KAZ IS NOT LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE, 

ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ON THIS PRODUCT IS LIMITED IN DURATION TO THE 

DURATION OF THIS WARRANTY.  Some jurisdictions do not allow the exclusion or limitation of incidental or consequential damages or limitations on how 

long an implied warranty lasts, so the above limitations or exclusions may not apply to you.  This warranty gives you specific legal rights, and you also may 

have other rights which vary from jurisdiction to jurisdiction.  This warranty applies only to the original purchaser of this product from the original date of 

purchase.

B.  At its option, Kaz will repair or replace this product if it is found to be defective in material or workmanship.

C.  This warranty does not cover damage resulting from any unauthorized attempts to repair or from any use not in accordance with the instruction manual.

Call us toll-free at 1-800-477-0457 or e-mail: [email protected]. Please be sure to specify a model number.
NOTE: IF YOU EXPERIENCE A PROBLEM, PLEASE CONTACT CONSUMER RELATIONS FIRST OR SEE YOUR WARRANTY.  DO NOT RETURN THE 

PRODUCT TO THE ORIGINAL PLACE OF PURCHASE.  DO NOT ATTEMPT TO OPEN THE MOTOR HOUSING YOURSELF, DOING SO MAY VOID YOUR 

WARRANTY AND CAUSE DAMAGE TO THE PRODUCT OR PERSONAL INJURY.

k

© 2016 All rights reserved. Kaz USA, Inc., a Helen of Troy Company • Marlborough, MA 01752 • www.vicksthermometers.com

This product is distributed under license from The Procter & Gamble Company.  VICKS and other associated trademarks are owned by  

The Procter & Gamble Company. Fever InSight and ComfortFlex are registered trademarks owned by Helen of Troy Limited. 

Protected by U.S. patents D535,898 and 5829878

 

 

Made and printed in China

Battery  

Compartment 

(on back side)

On/Off Button

Flexible Probe

Large Display with  

Fever InSight

®

 backlight

Probe Tip

Vicks

®

 ComfortFlex

®

 

Digital Thermometer

Model V966US

To protect the environment, dispose of empty batteries at appropriate collection sites according 

to national or local regulations. Keep out of reach of young children, elderly and pets.

Fig. 1

Fig. 2

IMPORTANT: Before first use,  

remove label from the display.

Fig. 5

Fig. 6

Fig. 3

Fig. 4

31IMV966202R1

CONSULT INSTRUCTIONS FOR USE

Color

Range (°F)

Range (°C)

Meaning

Green

97.0-98.9

36.1-37.1

Acceptable

Yellow

99.0-100.9

37.1-38.3

Elevated

Red

101+ 

38.3+

Possible High Fever

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