Samsung S8 Battery Temperature Too Low Fix. Lithium ion batteries can be charged at about 5C41F. The phone should go into recovery mode.

To solve the flash problem you have to be root user and download Wanam Xposed that app have an option to disable the camara temperature check. Once it was reinstalled it was charging correctly. Because Samsung devices and most other smartphones use Li-ion batteries the device cannot charge unless it is higher than 4C.
Use a new USB charging board.
First of all is the battery temperature actually too low. This problem often occurs when the outside temperature is too low. If the auto-brightness is on the Samsung Galaxy S8 battery will drain faster. May 10 2019 - Repair Samsung A520F Charging Paused Battery Temperature Too Low Samsung Galaxy A5 A520F Not Charging Solution Charging Ways Jumper Charging Paused.
