Model RAR188A Tried to change battery on remote sensor. Still doesn't work. I think I have to reset it but can't remember how.

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!

Sounds like you have an add-on remote. Try changing the frequency in the receiver & transmitter. If that doesn't work you probably need a new receiver.

\its most likely the ir sensor which has the issue. I will need the model number of your set to help you further on the issue. You can reply to this same post for further assistance if needed.

tried with reset doesn't work, ok it could be the IR sensor at the front panel of the tv doesn't work. but before you replace it you need to ensure if your remote controller is working. have you tried to check the remote with camera trick just to know if the remote controller is sending light to the IR sensor of the tv.

does the remote controller that you have been use is the original remote of the tv?. if yes tried to replace the battery, if still doesn't work tried with camera trick just to ensure if the remote controller work or the IR sensor of the tv was not working. just let me know if you know how to test the remote controller. now if you are using the universal remote controller make sure it was programmed properly with in the tv unit.

Hello!
First thing to do is: make sure, remote is working. Use your cell phone's camera to look at the front of the remote through. Push "power" button. Working remote will start emit infrared pulses or just light up. you can't see it with your ***** eyes, but camera can and let you see it. If remote works, then you may try to use universal remote to confirm operations. If none of remotes turn your set on/off, then the problem is inside of your TV. sensor or adjacent board is bad. that requires repair of your TV. If you can handle it, go ahead, pull it apart. But first, make sure you can get replacement board. "shopjimmy.com" might help you. enter the model# on search and they will show all available parts.
Good luck,
Alex.

You got to sync the remote with your console to activate the remote

you may need to change the remote code to the one for your model tv, or replace the batteries. instructions for this should be in the manual that cam with the remote.

welcome to Fixya !

here are some steps that you may follow. open the remote and remove batterys or cell of your model for six seconds (i dont know .cause you didnt mensioned the Model.) then place them back.
start the A/C again , see if it works if it doesn't then follow the lower step. and if it helps ignore the rest of paragraph

now open the Air conditioning vent and find the Sensor of the remote near the sensor there shall be a button very small one , maybe its located in a hole. check and observe keenly .
just push that button for once .it will reset the AC. to default

if it doesn't help then comment with a model no
best Regards

I've had a similar problem with another model, an Oregon Scientific Model IWA-80055 Wireless Thermo Clock, in which when I replaced the batteries in the remote sensor, the clock would not read the temperature from the remote sensor.
I found it fairly consistent to solve this by taking a battery out of place in the clock and putting it back in.  Unfortunately this also messed up the clock's time and date.  This is also in the instructions catalogue for the device, check and see if yours gives a similar solution.