How to troubleshoot a Samsung Galaxy S6 that heats up when plugged in but not charging at all

Charging issues are among the most commonly reported problems by Samsung Galaxy S6 (#Samsung #GalaxyS6) owners. Just a few weeks since it was released last year, there were already users who reported to have issues charging their phones. The problem ranges from slow to not charging at all and in this post, I will tackle a related concern sent by our readers–S6 is heating up while plugged in but not charging.


Before we go any further, I just want to set expectations here. The purpose of troubleshooting is to know what the problem is and from there, you can do what needs to be done so the problem will be fixed. It doesn’t necessarily mean that you would fix it yourself because there are just issues that are beyond your reach especially hardware-related ones. Having sufficient information about the problem, however, will help the technician know where to start if you carefully explained it to him.

For our readers who found this post but have other issues, please browse through our troubleshooting page to find if your concerns have already been addressed before. If so, try using the solutions or troubleshooting procedures we suggested but if they don’t work and you need further assistance, you may fill up this questionnaire and hit submit to contact us.


I’ve had my Galaxy S6 since November. It worked great and then one day the charger started heating up and would get really hot when I was charging it. I noticed my phone would get hot too. Then the fast charge stopped working. My boyfriend has an S5 and used my charger. Once he did his phone stopped charging correctly and wouldn’t even charge all the way at night. He only used it once because he didn’t have his regular charger. Since he’s been using his the problem went away for his phone. Mine still heats my phone up when it charges. I also tried to plug it into the computer to upload a video and it didn’t work so I had to use my boyfriends cable. I just want to make sure it’s okay that my phone is heating up so much when it is charging? If not, is there something I can do to fix it? P.s. If I use his charger my phone will take forever to charge.

Possible Causes

Since we don’t exactly know what the problem is, we need to do a thorough troubleshooting on this problem. That means that we need to include all possible causes:

  • Charger is busted
  • USB cable is broken
  • USB / utility port is loose
  • Too many apps and services running in the background
  • Firmware is unstable
  • Serious hardware issue

Step-by-step Troubleshooting

The best way to troubleshoot this problem is to rule out one possibility after another until we can find the culprit. Once we’ve successfully done that, it’s easier to formulate a procedure or a plan to fix it. These steps only apply if your phone didn’t suffer liquid and/or physical damages.

First Step: Boot Galaxy S6 in Safe Mode

This is, by far, the easiest troubleshooting procedure you can do and it will immediately isolate the problem. Booting the S6 in safe mode will temporarily disable all third-party services and downloaded apps. When there are too many apps running in the background, the phone may drain the battery quicker than usual and once you plug it in, it will start to heat up, which will consequently prevent fast charging.

Now, if the phone charges fine in safe mode and doesn’t heat up, then the problem is more of an app-related issue, which can easily be fixed. All you need to do is stop or uninstall apps that are causing the problem, or you can simply backup your data and do the factory reset and then build your apps list again.

Here’s how you boot the device in safe mode…

  1. Turn off your Galaxy S6.
  2. Press and hold the Power key.
  3. When ‘Samsung Galaxy S6’ appears, immediately release the Power key and then press and hold the Volume Down button.
  4. Continue holding the Volume Down button until the phone finishes the restart.
  5. When you see Safe Mode on the lower left corner of the screen, release the button.

Second Step: Inspect the power adapter

Assuming the phone still heats up and doesn’t charge in safe mode, it’s time to go after the power adapter or the charger. You may ask why not rule out the possibility that it’s just a firmware issue? It’s because we are not sure that it’s a firmware issue or a hardware problem. For the sake of saving you from the troubles of backing up all your data, it’s better we rule out the possibility that there’s an issue with the accessories because if we’re right, then you just need to buy a new charger and that’s all!

Based on your description, your boyfriend’s S5 already started acting up like your phone when he used your charger, so there’s really a big chance that it’s a power adapter issue. With that in mind, stop using it for now and the best way to rule this possibility out is to use a different S6 charger.

I don’t know if you have access to one but before you decide to send the phone in for repair or do a reset, it’s better that you borrow a charger from another S6 owner and use it or you can just invest in another power adapter. If your phone charges fine with other charger, then you know what to do.

Third Step: Inspect the USB cable

If your Galaxy S6 did the same when you used a different charger and assuming you used the same USB cable, then try to check if you can find any breakage. You may run your fingers through the entire length of the cable to feel something unusual.

You may also check both ends to see if there are pins that were bent or misaligned especially on the end that you connect your phone to since the pins are very fine and can easily be bent. If this is case, it’s very difficult to realign them so the most practical solution is to buy a new cable or new charger.

Fourth Step: Inspect the USB / Utility port on your phone

If you used a different charger and cable, you may skip the third step and head directly to this step.

The best thing you can do now is to physically check if there are bent pins in the USB port on your phone. If you can see one or two, you may use a toothpick to straighten it out and make sure it’s not touching other pins. It’s often the reason why the phone doesn’t charge properly or not being detected when connected to a computer.

Fifth Step: Try charging the phone while it’s powered off

Assuming you did all those things already and you can’t find anything that’s causing the problem, then try to turn off the phone and plug it in. If it charges fine and not heating up while powered off, it could be a firmware issue, otherwise, it’s almost certain that it’s a hardware problem. But either way, you still need to do the next step.

Sixth Step: Do the master reset

Before doing this, you need to backup all your data first and I hope your phone still has enough power to let you do it.

Once you’ve finished backing up, remove your Google account and disengage any screen lock you enabled to make sure Factory Reset Protection (FRP) isn’t tripped and then follow these steps:

  1. Turn off your Samsung Galaxy S6.
  2. Press and hold the Volume Up, Home and Power keys together.
  3. When the device powers on and displays ‘Power on logo’, release all keys and the Android icon will appear on the screen.
  4. Wait until the Android Recovery Screen appears after about 30 seconds.
  5. Using the Volume Down key, highlight the option, ‘wipe data/factory reset’ and press the Power key to select it.
  6. Press the Vol Down button again until the option ‘Yes — delete all user data’ is highlighted and then press the Power key to select it.
  7. After the reset is complete, highlight ‘Reboot system now’ and hit the Power key to restart the phone.

Last Step: Send the phone for repair

If the reset failed to fix the problem, then you need someone who can do further troubleshooting and fix the problem. You may go to the store where you bought it, to your provider or call Samsung for an appointment.

At this point, there’s not much you can do to fix the problem.

Related Problems

Q:Unable to charge phone. Computer doesn’t recognize phone is plugged into it. Phone doesn’t charge when plugged into wall plug.”

A: Try following the second and third steps above.

Q: My Samsung Galaxy S6 is heating up so bad when I charge it. I only bought it in February but now it’s acting up. Why is it doing this?

A: I have a feeling that you just receive the Android 6.0.1 Marshmallow and this problem started. It can be just corrupt cache problem so try these steps first:

  1. Turn off the device.
  2. Press and hold the following three buttons at the same time: Volume Up key, Home key, and Power key.
  3. When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key.
  4. When the Android System Recovery screen appears, release the Volume Up and Home keys.
  5. Press the Volume Down key to highlight ‘wipe cache partition.’
  6. Press the Power key to select.
  7. When the wipe cache partition is complete, ‘Reboot system now’ is highlighted.
  8. Press the Power key to restart the device.

If deleting the system cache didn’t fix the problem, then follow the instructions I cited in sixth step to reset your phone.

Q: Galaxy S6 is draining the battery very fast and when I charge it, it charges very slow. Doesn’t it have the fast charging feature? Why is it charging so slow?

A: Yes, the Samsung Galaxy S6 has a fast charging feature, however, there are requirements that should be met so that it functions and among those requirements are: the screen must be turned off and the device should not heat up. I have a feeling though, that there are just a lot of apps running in the background that’s why your phone sucks the juice really fast but charges very slow. Because of this, it might also be heating up, which prevents the fast charging feature from working. Follow the first step.

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