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Phone won't charge ... battery temp to low always comes on !!!

Galaxy s j3(6) constant message popping up thast charging stopped batterry temp too low. How do I stop this from happening? I am in my home it's not cold
 
Reboot the phone, just in case.

Look up what the minimum temperature for fast charging is supposed to be (I think you are saying that it's fast charging that has stopped, not all charging). What temperature does the system think the battery is at?

Is this the original battery or a replacement? I once met a replacement battery that didn't have a temperature sensor at all (just hard-wired to report the same temperature regardless) - I sent that straight back as it was obviously not the genuine battery it was sold as. Point is that some replacement batteries are unreliable.
 
Try removing your J3's battery, and leave it out for several minutes (at least 15-20). This allows any residual power drain out. Then put it back in and put your phone back together and see if that low temp error message still pops up.
Since you're powering your phone off anyway, you might also want to clear the system cache partition. Note that the system cache resides in its own dedicated partition completely separate from the data partition, where all your personal files and things are stored, so this won't have any affect on your personal data. You also need to do this while running in your J3's Recovery Mode. To get into Recovery Mode you need to simultaneously hold down the Volume Up, the Home, and the Power buttons. Recovery Mode is a text-only interface so you need to use the indicted buttons to navigate through the various options. Select the 'wipe cache partition' option (being careful to not accidentally select one of the other, nearby options), and then just follow through and restart your phone.
http://www.hardreset.info/devices/samsung/samsung-j320p-galaxy-j3-2016/recovery-mode/
At this point if you're still seeing the low temp error message you could try just getting a new battery but doing a quick search online that message apparently is often a sign of an internal hardware error.
 
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