TLDR: It was the Main Flex Cable.
Since this is one of the first site that comes up when googling "Samsung A52s temperature too low" I want to share how I solved the problem. Thanks you everyone who I mention below!
How I solved the problem eventually:
I had the problem suddenly come up after 25 month of using the A52s (and therefore the phone was out of warranty). Phone randomly did not charge with the message "Temperature too low".
Using the App "DevCheck" as suggested by @milfie (Cost: Free) under "Battery" - "Information" the Temperature reading showed random False readings with the charging halting every time the reading fell below 0°C.
Using the iFixit Guide for the similar model A52 I changed the Battery (Cost: 15€ incl. shipping) as suggested by @timtomissus but the problem remained.
Then I changed the "daughter board" aka the "charging port board" (Cost: 15€ incl. shipping) as suggested by @oldturkey03 but the problem still remained.
Finally after a few month of the phone laying around unused I tried replacing the "Main flex cable" (Cost: 8€ incl. shipping) as it was suggested just recently by @zweligolowa in his short but genius reply "It is the flex cable" and this fixed the problem for me immediately.
If I had to do it again, I would do it in the following steps:
- Make sure its the same issue by installing DevCheck and checking the temperature readings.
- Try replacing the Main flex cable as it its the easiest, cheapest and most resource-saving of suggested repairs.
- Try replacing the Battery, as the battery has a limited lifetime and you profit from a fresh battery life.
- Try replacing the Charging port board.
- Report here for others :)
Best of luck.
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