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Oregon scientific model no rar186 how to set up outdoors sensor

Replaced batteries in outdoor sensor and pushed reset. Now the indoor and outdoor units are not communicating. How do I get the system working again?

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Tobias Funke

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I have had this Oregon Scientific model RAR186 unit for years and it works great. The only issue I ever have is when the batteries need to be changed in the remote sensor unit (Oregon scientific model #THN122). It never fails that once I change the batteries that the unit does not send a signal to the base unit. I will often hit the reset button and change the channels on the remote sensor before I finally remember that you need to do the following to get the sensor to talk to the RAR186 base unit:

On the base unit (RAR186), hold down the CHANNEL and MEM buttons for at least two seconds.
You will then see a graphic appear above the channel number that shows that it is searching for the sensor.
Within a minute, you will then see the temperature displayed for the sensor showing that they are communicating.

This is buried in the manual that you probably discarded as did I.

Apparently, if your sensor is broken, you can either search to find a new sensor of the same model or also use the following sensors: THC138, THGR122NX, or THN132N
I have not needed to replace the sensor as once I found the instructions to reset the communication between the sensor and base unit, all was fine. Hope this helps someone. I wrote this instruction using a Sharpie on the inside cover of the sensor since you have to remove 3 screws to replace the AAA batteries (2) in hopes I will remember next time and not waste my time searching the internet and not find the answer. Good luck!

Posted on Jan 31, 2014

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3 Related Answers

Anonymous

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SOURCE: i put new batteries into both units, the indoor

I'm having the same problem and can't find an answer. Seems this also happened with another model we had - planned obsolescence? It was working fine, flashing due to low battery. Now, nothing from outside. Annoying.

Posted on Oct 18, 2010

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Steve

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SOURCE: The outdoor temperature & hygrometer

Hi Walter,

I found this in the manual, simply pressing the RESET button won't start communication again. Try this:

Your main unit displays current, minimum, and
maximum temperature and humidity readings
collected by the remote sensor and main unit.
Outdoor data is collected and displayed every
40 seconds and indoor data is collected and
displayed every 10 seconds.

The red LED flashes whenever the sensor
transmits an RF signal to the receiver.
select sensor or use auto scan

• Press CHANNEL to switch between
sensors 1-3.
• To auto-scan between sensors, press and hold
CHANNEL for 2 seconds. Each sensor's data
will be displayed for 3 seconds. To end autoscan,
press CHANNEL or MEMORY.
• Press and hold CHANNEL and MEMORY
simultaneously to search for remote sensors.
resetting the system
The RESET buttons are located on the back of the
main unit and sensor. Use a pointed subject to
press RESET when you change the batteries and
whenever the system malfunctions.

Posted on Jul 13, 2011

billklucas

  • 1 Answer

SOURCE: I have the Acurite 00604RX

how do i set my clock for accurite 00604RX

Posted on Sep 07, 2011

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1 Answer

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I have had this Oregon Scientific model RAR186 unit for years and it works great. The only issue I ever have is when the batteries need to be changed in the remote sensor unit (Oregon scientific model #THN122). It never fails that once I change the batteries that the unit does not send a signal to the base unit. I will often hit the reset button and change the channels on the remote sensor before I finally remember that you need to do the following to get the sensor to talk to the RAR186 base unit:

On the base unit (RAR186), hold down the CHANNEL and MEM buttons for at least two seconds.
You will then see a graphic appear above the channel number that shows that it is searching for the sensor.
Within a minute, you will then see the temperature displayed for the sensor showing that they are communicating.

This is buried in the manual that you probably discarded as did I.

Apparently, if your sensor is broken, you can either search to find a new sensor of the same model or also use the following sensors: THC138, THGR122NX, or THN132N
I have not needed to replace the sensor as once I found the instructions to reset the communication between the sensor and base unit, all was fine. Hope this helps someone. I wrote this instruction using a Sharpie on the inside cover of the sensor since you have to remove 3 screws to replace the AAA batteries (2) in hopes I will remember next time and not waste my time searching the internet and not find the answer. Good luck!

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1 Answer

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1 Answer

I changed batteriers and now I can't get a reading from the remote. I have hit the reset on both units. Maybe not in the righ order.


I believe they ask you to press the reset button on the main unit first, but that may not be your problem. Double check the batteries to make sure they are installed correctly. If one of the batteries in the outdoor sending unit is in backwards, it will not send the outdoor data. On the indoor unit, there is typically one battery that is used for receiving the signal from the outdoor unit. If all of the batteries are in correctly but that one, you will see the display and the indoor temperature information, but the outdoor information will not be displayed. Also, make sure the units are close enough to transmit.

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