La Crosse 308-1409BTv4 Wireless Thermometer
POWER UP
- Insert 2 AA batteries into your Outdoor Sensor.
- Insert 2-AAA batteries into your Thermometer.
- Enter the Settings Menu to adjust your time.
- Once the sensor is reading to your thermometer, place the sensor outside in a shaded location.
View our sensor mounting video here: bit.ly/th_sensor_mounting
FAHRENHEIT OR CELSIUS
- Press +/°F/°C to select Fahrenheit or Celsius Temperature Display
SETTINGS MENU
- Hold the SET/HI/LO button until the display changes to enter the Settings Menu. Press and release the +/°F/°C button to adjust values. Hold to adjust quickly.
- Press and release the SET/HI/LO button to confirm values and move to the next setting or exit the menu.
HI/LO TEMPERATURE RECORDS
Press the SET/HI/LO button to view the HI, then the LO Temperature Records.
Reset HI /LO Records:
- Press the SET/HI/LO button to view records
- When viewing HI/LO records, hold the
SET/HI/LO button for five seconds to reset all records at one time. - HI/LO readings will reset to the current temperature.
Note: The records will automatically reset daily at 12:00 AM.
TEMPERATURE TREND ARROWS
The arrows next to the temperature readings indicate if the temperature is rising, falling, or remaining steady.
Temperature has risen (2°F / 1°C)
The temperature has not changed
Temperature has fallen (2°F / 1°C)
SEARCH FOR OUTDOOR SENSOR
- If the sensor loses connection to the thermometer for any reason, the thermometer will show dashes after 30 minutes.
- The thermometer will automatically search for 3 minutes every hour to try and reestablish the sensor connection.
- To manually search for your Outdoor Sensor, hold the +/°F/°C button until the Reception Icon
begins to flash.
- When the sensor is connected, the Reception Icon will be solid.
- If your thermometer is unable to reconnect on its own, a Restart may be necessary.
RESTART
- Bring your sensor inside next to the thermometer and remove batteries from both devices.
- Press any button at least 20 times, and then wait 15 minutes.
- After the wait, install fresh batteries into both your sensor and thermometer. Your outdoor temperature should return within the next few minutes.
- Keep your sensor next to the thermometer for another 15 minutes to establish a strong connection.
- Once the connection is reestablished, place it back outside in a shaded location.
Note: Pressing the TX button inside the sensor’s battery compartment will help force a transmission.
LOW BATTERY INDICATOR
- Low Battery Icon
by Outdoor Temperature. Replace batteries in the Outdoor Sensor.
- Low Battery Icon
by the Indoor Temperature, replace batteries in the Thermometer.
SENSOR WEATHER SHIELD-NOT INCLUDED
- The Sensor Weather Shield is designed to protect your outdoor sensor from rain and snow. Optional.
- This shield will offer limited protection from the sun’s heat.
- Optional Purchase at: bit.ly/925-1418
SPECIFICATIONS
308-1409BTv4
- Temperature Range: 32°F to 122°F (0°C to 50°C)
- Humidity Range: 10% to 99% RH
- Power Requirements: 2 “AAA” LR3 Batteries (not included)
- Battery Life: 24+ months with reputable batteries
- Dimensions: 2.63 In L x 1.35 in W x 3.67 in H (6.69 cm L x 3.44 cm W x 9.34 cm H)
TX141-Bv4
- Temperature Range: -40°F to 140°F (-40°C to 60°C)
- Transmission Range: over 330 feet (100 meters) in open air RF 433MHz
- Power Requirements: 2 “AA” LR6 Batteries (not included)
- Battery Life: 24+ months with reputable batteries
- Dimensions: 1.58 in L x 0.83 in W x 5.08 in H (3.99 cm L x 2.1 cm W x 12.99 cm H)
STAY IN TOUCH!
Ask questions, watch setup videos, and provide feedback on our social media outlets. Follow La Crosse Technology on YouTube, Facebook, Instagram, & X (Twitter).
WE’RE HERE TO HELP
If you require additional support, call our friendly customer support team based in La Crosse, Wisconsin.
- Self Help: bit.ly/308-1409btv4_support
- Phone: 1.608.782.1610
- Online: bit.ly/contact_techsupport
Our knowledgeable customer support team is available: Monday-Friday, 8 am6 pm CST.
Scan for Support
CARE AND MAINTENANCE
When batteries of different brands or types are used together, or new and old batteries are used together, some batteries may be over-discharged due to a difference in voltage or capacity. This can result in venting, leakage, and rupture, and may cause personal injury.
- Do not mix Alkaline, Lithium, standard, or rechargeable batteries.
- Always purchase the correct size and grade of battery most suitable for the intended use.
- Always replace the whole set of batteries at one time, taking care not to mix old and new ones, or batteries of different types.
- Clean the battery contacts and also those of the device prior to battery installation.
- Ensure the batteries are installed correctly with polarity (+ and -).
- Remove batteries from the product during periods of non-use. Battery leakage can cause corrosion and damage to this product.
- Remove used batteries promptly.
- For recycling and disposal of batteries, and to protect the environment, please check the internet or your local phone directory for local recycling centers and/or follow local government regulations.
WARNING: This product can expose you to chemicals including acrylonitrile, 1, 3-butadiene, and styrene, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to: www.P65Warnings.gov
WARRANTY
La Crosse Technology Ltd. provides a 1-year limited-time warranty on this product relating to manufacturing defects in materials & workmanship. Per the Song-Beverly Act, in the state of California, the warranty on this item becomes effective on the date of delivery.
La Crosse Technology, Ltd, 2830 S. 26th St., La Crosse, WI 54601
For Full Warranty Details, Visit: www.lacrossetechnology.com/support
Patents: www.lacrossetechnology.com/patents
FCC STATEMENT
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Increase separation between equipment & receiver.
- Consult the dealer or an experienced radio/TV technician for help.
This device must not be co-located or operating in conjunction with any other antenna or transmitter. Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired operation.
CAUTION!
The manufacturer is not responsible for any radio or TV interference caused by unauthorized changes or modifications to this equipment. Such changes or modifications could void the user’s authority to operate the equipment.
All rights reserved. This manual may not be reproduced in any form, even in part, or duplicated or processed using electronic, mechanical, or chemical process without the written permission of the publisher. This booklet may contain errors or misprints. The information it contains is regularly checked, and corrections are included in subsequent editions. We disclaim any responsibility for any technical error or printing error, or their consequences. All trademarks and patents are recognized.
DOUBLE YOUR WARRANTY
Scan the QR Code or visit: bit.ly/308-1409btv4_register to register your product and double the standard 11-year warranty for free by opting to receive occasional product emails.
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La Crosse 308-1409BTv4 Wireless Thermometer- FAQs
Q1. What does the wireless sensor do?
It measures outdoor temperature and humidity and sends the data to the indoor display.
Q2. How do I set the time?
Hold SET for 2 seconds, adjust with +/-, then press SET to confirm.
Q3. How do I reset the thermometer?
Remove batteries from both units for 10 minutes, press any button, then reinsert.
Q4. Can I calibrate it?
No, readings cannot be calibrated—proper placement ensures accuracy.
Q5. Why is my outdoor reading too high?
Sensor is likely in direct sun or near heat; place it in a shaded, ventilated area.
Q6. How often does it update?
Sensor updates data every 30–60 seconds.
Q7. What batteries should I use?
Use fresh alkaline AA batteries, not rechargeable or lithium.
Q8. What if the outdoor sensor is not working?
Replace batteries, move it closer to the display, or restart both units.