I am trying to just the temperature on a Casio watch model number 3043

I can't determine which Casio watch you own by the model number. Maybe you can provide the module number (4 digits) that is on the back of the watch. With that you can also download a manual here:
Timepieces Watches Manuals CASIO

On pages 2 and 3 of the manual (module 3043) you can find the instructions for automatic and manual time setting.

The manual can be downloaded here (direct download link):
http://ftp.casio.co.jp/pub/world_manual/wat/en/qw3043.pdf

Hi,you need to look at the user manual..
just in case ,if you need soft version of the user manual pls visit the URL below..

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CASIO Watch User Manual Archives

http://world.casio.com/wat/download/en/manual/
Use this page to download a copy of CASIO watch manuals in PDF format.
To download a PDF file, enter the four-digit (or three-digit) module number marked on the back cover of your watch.

You can get instructions from the Casio web site.

Go to the casio web site "casio.com".

Select "support" and the "manuals",
watches;

Accept terms

Select "watch manual archive"

Read the number of the back of your watch and enter it into the search box

You can get instructions from the Casio web site.

Go to the casio web site "casio.com".

Select "support" and the "manuals",
watches;

Accept terms

Select "watch manual archive"

Read the number of the back of your watch and enter it into the search box.

See the web page for instructions on where to find the watch number.

Unfortunately I can not check out watch functionality by model number GW500A-1V. Follow this link and enter required number.Casio online manuals sometimes differ from those supplied with watches, so, download this one and follow instructions. See if it'll help. http://world.casio.com/wat/download/en/manual/

If you haven't got instructions, you can get
instructions from the Casio web site.

Go to the casio web site "casio.com".

Select "support" and the "manuals",
watches;

Accept terms

Select "watch manual archive"

Read the number of the back of your watch and enter it into the search box

http://world.casio.com/wat/download/en/manual/


Use the four numbers on the back of your watch and you will have a PDF version of your instruction manual.

Hope this tip helps
R/
David

The battery is CTL 1616 and I had the same occurance when I opened up my model Casio model 3043. I needed to use the battery to test my model 2767 and find out if a new battery would bring it back to life (yes, it still lives). After replacing the battey back into my 3043, I jumped the (ac) to (-) and at first the watch would indicate all was well but then it would revert back to "open". I tried over and over to try and get the "open" display to clear but I was not successful. I then thought to go ahead and replace the back on the case to see if the three contact springs would change the display and sure enough, "open" no longer was in the display. The watch works perfectly as before. As for the 2767, as soon as I jumped the (ac) to (-) the "open" display went away. There is only one spring contact to the back case on the 2767 model. Unfortunately I do have an extra spring that fell out when I opened it up and I have no clue as to where it goes. I have not found anyone who can help me on the location for the shorter spring. Any advice would be most helpful.

Hi Try www.casio.com input model number