The Galaxy S24 is a 6.2-inch aluminum phone with a 4,000 mAh battery, and it is the S24 owners' complaint about heat that fills Samsung's community forums since One UI 8.5: phones that run warm with the screen off, heat during a video call, and apps such as shopping and delivery apps that make the back too hot to hold. Heat while you game, film in 4K or charge is expected. Heat that appears at rest, or since an update, is the case to work on, starting with the newest patch, the offending app, and a Safe mode test.
Differential
Likely causes of “Samsung Galaxy S24 gets hot or shows a temperature warning”, and how to tell them apart
- 1
An update that left a background job running
What separates it Warmth and drain started the day One UI 8.5 or a patch installed and the phone is warm in a pocket
How to confirm Install the newest patch, restart, and check Battery usage the next day; owners on Samsung's forums were told to wait for fixes in later patches
- 2
One app that holds the processor
What separates it A shopping, delivery or video-call app is at the top of Battery usage and the back is hot while it is open
How to confirm Update the app, clear its cache, and test whether the heat follows that app
- 3
Charging while in use
What separates it The camera bump area is hot during a 25 W charge while you stream or play
How to confirm Charge idle, wired and without the case, and see whether the temperature drops
- 4
Camera or gaming load
What separates it Heat builds after twenty minutes and the display dims
How to confirm Rest the phone; the chip throttles to protect itself
- 5
Direct sun or a car dash
What separates it The phone is hot after being left in a window
How to confirm Move it to shade and let it cool before charging
Before you touch a setting
Record this first — changing settings destroys the evidence
- When it is hot: charging, one app, video call, or sitting idle
- The top three apps in Settings, Battery, Battery usage
- Case, charger and whether it is hot with the screen off
- One UI version and security patch date under Software information
Try in this order
0 of 6 completedCool the phone first
ReversibleClose apps, take off the case, switch the screen off and leave the phone in the shade. Do not use a fridge or freezer.
Find the app responsible
ReversibleSettings, Battery, Battery usage. Tap the top app and see whether its time is in the foreground, which you caused, or in the background.
Update and restart
ReversibleSettings, Software update, Download and install, then restart. Samsung has been releasing patches after the One UI 8.5 heat and drain reports.
Update or clear the app
ReversibleOpen Play Store and update the app, then Settings, Apps, the app, Storage, Clear cache.
Charge in better conditions
ReversibleUse the Samsung 25 W charger or a PD PPS adapter, charge idle on a hard surface and without a case.
Test in Safe mode and report it
ReversibleHold Power off, tap Safe mode and watch for an hour. If heat stops, remove recent apps. If it does not, open the Samsung Members app, Get help, Error report, and send it.
Model-specific
What is true of this model and not of its siblings
- What the heat reports have in common
- Across Samsung's S24 threads the common elements are the One UI 8.5 update, a particular app held at the top of the battery list, and heat that appears with the screen off. Owners who fixed it describe either a later patch or removing the app, so keep a note of the app and the date the heat began, because that is what a Samsung agent asks for.
- Chip by region
- The US S24 uses the Snapdragon 8 Gen 3 for Galaxy; many other markets use Samsung's Exynos 2400. Reviewers and owners generally find the Exynos models run warmer, so check Settings, About phone for the model number before you compare experiences with a friend's phone.
- Use cases that heat any phone
- Navigation with the screen at full brightness in a hot car, 4K video at 60 frames, and long video calls are classic triggers; moving the phone out of the sun and lowering brightness are the cheap tests.
Stop boundary
When this stops being a self-service repair
- !If the phone is hot with the screen off in Safe mode, send an error report through the Samsung Members app and book a Samsung check
- !If heat started only after the update and an app is not responsible, keep the phone on the newest patch; owners report fixes arriving in later patches
- !A swollen case or a burning smell means service now
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Is the S24 overheating after One UI 8.5 a known problem?+
Many owners describe heat and heavy standby drain after One UI 8.5 on Samsung's community forums, and Samsung's replies ask them to send error reports through Samsung Members while fixes arrive in later patches.
Is the S24 hotter than the S24 Ultra?+
The S24 is the smaller of the family at 6.2 inches, so it has less area to shed heat under the same load.
Is it safe to use the S24 while it charges?+
Light use is fine; gaming or video while fast charging stacks two heat sources and is what most heat reports describe.
When is heat a fault?+
When the phone is hot with the screen off in Safe mode, or the back swells.
Is a warm S24 harmful to the battery?+
Sustained heat shortens battery life over the years, so reducing the causes, such as charging in a case or leaving the phone in the sun, is worth doing even when the phone is not alarmingly hot.
How do I send Samsung an error report for heat?+
Open the Samsung Members app, tap Get help, then Error report, and describe when the heat happens. Samsung asks for this in its forum replies to One UI 8.5 heat and drain reports.