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When I try to charge my phone, it says it is too cold, even though that's definetly not the case. I checked the sensor with "DevCheck" and it says it's -20°C. In some rare cases, it shows more °C and charges, but most of the time it doesnt.
So I want to replace the part with the broken sensor now and need to know where the sensor is. So...does anyone know?
Thanks in advance!
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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:
Best of luck.
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@nuclear_octopus Great write-up; thanks for coming here and detailing your experience so others can benefit from your learning! Much appreciated.
I have to register an account to upvote this! Thank you for your helpful answer, I was able to purchase a flex cable and replace it by myself, after that the problem went away immediately.
i had a simular problem and could fix it with hitting the back of the phone with a light hit
Currently experiencing a similar issue with an A54. It won't charge, even when off. When I turn it on within 3 or 4 minutes it gives me a overheating notification and closes all apps.
The phone was originally giving an overheating error and when I inspected it, the back was being pushed out, I believed the battery was bulging. Took it to a local repair shop and they replaced the battery. When I got it back, it still has the overheating error and doesn't seem to want to charge.
I installed a couple apps to troubleshoot, the CPU-Z app shows the battery temp at around 80C. I really just want to recover the files on the phone, but it doesn't let my transfer things via usb and I can only transfer stuff for a couple minutes at a time over network.
I suspect this might be an issue with the charger port board, because it doesn't want to charge / tether. I'm wondering if maybe it's got a short and is putting actually strain on the battery. The only thing is the phone feels completely cold when I'm using it.
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@milfie besides the excellent answer by my colleague @timtomissus and a change of the battery does not yield the desired result, there are more thermistors
The one for the charing is actually on your daughterboard. Sorry, did not have a great picture of it, but this should give you an idea of the location
If a new battery doesn't work, consider replacing the daughter board.
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@oldturkey03 teamwork!
@timtomissus and that is how we will get things accomplished :-)
Hey guys, thanks for your answers. I replaced both of them but unfortunately, it was neither the daughterboard nor the battery. Do you have any other ideas?
@milfie just to make sure, you replaced both the battery and the charging port. Still not charging?
Post some good pictures of the main board (both sides) and post those with your question. There might be further thermistors on the board.
According to the block diagram and confirmed by the parts list, it appears there are five thermistors, or temperature sensors, that are connected to the Sub PMIC chip and they're labelled AP_THM, BAT_THM, CHG_THM, PA_THM and WIFI_THM. Haven't been able to find an actual schematic diagram to confirm where those sensors are physically located, though. My best guess is that the BAT_THM and CHG_THM have been covered by replacing the charging port and the battery, but it's not clear where the others are.
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It is the flex cable
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@zweligolowa which one? Which flex cable?
I have tried to fix my Samsung A16, but it still having the error. My problem just popped up after the Samsung customer service replaced the touch screen. For me to achieve successfully charging i have to switch on Bluetooth, mobile data nad even play music so that the temperature don't drop.
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well, before you do that
have you spilled liquid on it?
have you tried cleaning the charging port?
also with the little googling i did i found this thread that says you should maybe try replacing the battery, as it could be the batteries' thermal sensor messing up, so i think you'll have to replace your battery
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No i did not spill any liquid on it.
I also cleaned the charging port already.
Okay, then I try replacing the battery.
I spilled some liquid on my phone and i tried changing the flec cable battery and the chargingport motherboard but nothing worked
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Most temp sensors are in the actual battery, you might need to replace the battery which is not a bad idea anyways, fresh new battery is always a good thing.
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@antoniomarchesi already been suggested and done so by the OP
Sorry, when I was shown the question there was no answers listed for it.
@antoniomarchesi nothing wrong with it :-) just wanting to make sure that you don't feel you are being ignored etc. Every answer is important.
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