[13 Fixes] Why Does My iPhone Keep Dimming? Here's the Answer


Jan 19, 2022 (Updated: Jun 14, 2023) • Filed to: Fix iPhone

5K views, 5 min read



Will your iPhone brightness keeps dimming suddenly? And you have no idea about it. Does it mean your iPhone needs repairing in Apple Store? No, it's not all right. Keep reading, the following can gives you the fully clear answer.

If your iPhone brightness keeps dimming and you don't know why then this article is right here for helping you. iPhone brightness dimming can be caused by certain features being turned on accidentally or software or hardware issues.

Don't worry too much, this article will specifically explain the possuble causes of the problem and 13 practical solutions to fix the iPhone keeps dimming issue, so you can see your screen and use it comfortably.

iPhone keeps dimming

Part 1. Why Does Your Phone Screen Keep Dimming with Auto Brightness Off?

Generally speaking, the problem where your iPhone screen keeps dimming is caused by auto-brightness. This can cause your iPhone to keep dimming even after your turn the brightness up. The auto-brightness function is aim to protect your eyes from damaging when you go into a darker environment throught shifting your iPhone screen to be dimmer.

If you are still experiencing the problem of your iPhone keeps dimming despite having auto-brightness off, then the problem could be due to:

  • Some features turned on such as low power mode, night shift, true tone, etc.

  • iPhone is too warm. When charging, iPhone gets warm and the display gets dimming.

  • Something wrong with your iPhone operating system or a recent update.

Part 2. How Do You Stop Your Phone from Dimming Itself?

If your iPhone screen keeps dimming issue bother you so much, then check the following 13 solutions, you can certainly fix this problem right now. Good new, you can directly locate to the 10th solution if you need a quick fix and don't want to try these all methods one by one, since the 10th one can get the error done with 100% certainty.

1. Turn off Night Shift

Night Shift is one of the iPhone’s features that causes your iPhone display colours to become warmer. This feature was made to help users sleep better at night after using their iPhones. It may be causing your iPhone screen keeps dimming as the day goes on, causing you to keep turning your brightness up.

You can switch off Night Shift to solve iPhone keeps dimming problem by following these steps:

    Go to Settings. Select Display & Brightness then select Night Shift.

    Toggle Manually Enabled Until Tomorrow to switch the Night Shift feature off.

    The Night Shift feature may be switched on for particular hours in the day - make sure Scheduled is toggled off to prevent this.

turn off iPhone night shift

2. Turn off True Tone

True Tone is an iPhone feature that adapts the colours of your iPhone display according to the light intensity and conditions in your surroundings. This feature may think that the light conditions around you are dimmer than they appear, causing your iPhone screen keeps dimming. If you want to turn True Tone off, you can do so by following these steps:

    Go to Settings and select Display & Brightness.

    Press True Tone to toggle it off.

turn off iPhone true tone

3. Turn off Attention Aware Features

The Attention Aware iPhone feature works by keeping your iPhone screen lit up when you are using Face ID and keeping it on when you are reading. This can cause your iPhone screen brightness to keep dimming when you look away from your device. Follow these steps to switch off the Attention Aware feature on your iPhone:

    Open Settings. Select Accessibility then press Face ID & Attention.

    Select Attention Aware Features and toggle them to be off.

turn off iPhone attention aware features

    Enter your iPhone password to turn this feature off.

4. Turn off Zoom Filter

If the error still can't be fixed, then Keep Zoom Filter feature turned off may work to solve your iPhone brightness keeps dimming even with Auto-brightness off. Just follow the below steps to do the operations:

    Go to Settings > Accessibillity > Zoom.

    Set Zoom Filter as None.

turn off iPhone zoom filter

5. Adjust iPhone White Point Setting

The White Point setting is an accessibility feature that reduces the vibrancy of the colors on your iPhone screen. The purpose of this feature is to prevent discomfort and strain in the eyes. If this feature is on, it may cause your iPhone brightness to keep dimming. In order to switch this feature off, follow these steps:

    Open Settings and select General.

    Select Accessibility then Display Accommodations.

    Turn Reduce White Point off.

turn off reduce white off

6. Turn off Always on Disaplay

Always on feature is enabled by default on iPhone 14 and iPhone 14 Pro Max. It dispalys date & time, widgets and other inforations when your iPhone is not in use. This feature may cause your iPhone keep dimming also. To turn it off, here are the steps:

    Open Settings and select Display & Brightness.

    Find Always On feature and toggle the swicth off.

turn off always on feature

7. Turn off Auto Lock

Auto Lock on iPhone is a feature to automatically lock screen to save power. This feature can make iPhone screen keep dimming often when not in use. To turn Auto Lock off, follow the instructions below:

    Open Settings and select Display & Brightness.

    Find Auto-Lock feature and tap on it.

    You will see mutiple options. tap on Never.

turn off auto lock

8. Check the Ambient Light Sensor

The ambient light sensor on your iPhone detects how bright your surroundings are. The auto-brightness feature on your iPhone uses information from the ambient light sensor to adjust your phone’s brightness settings according to the light conditions in your surroundings.

    You can test your iPhone's ambient light sensor through the auto brightness feature. Set your manual brightness to a high level and toggle the auto brightness feature on when you are in a dark room. The screen should automatically dim.

    If your screen does not dim automatically then there is likely a problem with your iPhone’s hardware that is causing your iPhone brightness to keep dimming. You should take your iPhone to an Apple store for a second opinion on this issue.

9. Restart iPhone

The problem where your iPhone screen keeps dimming could be caused by a glitch in your iPhone's software. This can be rectified by a simple iPhone restart.

    To restart iPhone X/11/12/13/14, press and hold down the Lower Volume and the Side buttons until the slider appears, then slide it to the right to turn it off. Wait for about 30 seconds long press the Side button to turn it on.

    To restart iPhone 8/7/6/5, press down the Side/Top button until the slider appears. Then drag it to turn your device off and finally press the same button to turn it on.

restart iPhone

10. Stop iPhone Brightness from keeping Dimming with 100% Success Rate

Well, if the hard reset fails to help you fix the iPhone keeping dimming problems, then there are some big problems with the iPhone's software that cause your iPhone to keep dimming.Using the all-in-one iPhone repair program WooTechy iPhixer is the best fix you could directly use.

iPhixer is a professional and powerful tool that can help resolve any iPhone/iPad issues, including iPhone bringhtness keeps dimming problems without any data loss. Moreover, there is not too complex operations needed, anyone can use this tool to fix the iPhone/iPad issues they meet.

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If you would like to know how to use iPhixer to resolve the issue where your iPhone keeps dimming, follow these steps:

Step 1 Launch the software and make your iPhone connected to the computer. Select Standard Mode.

select repair mode

Step 2 Click Next. You will have to click the Download button to get the firmware.

download iPhone firmware

Step 3 After the firmware has been downloaded, verified and extracted, iPhixer will resolve your iPhone keeps dimming soon.

repair iPhone OS


Your iPhone will restart automatically and you will find out your iPhone keeps dimming trouble be solved and all are back to normal.

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11. Reset All Settings

You may find that the issue where your iPhone keeps dimming is caused by a random setting that you didn’t check. You can try to reset all settings to resolve this because all of your screen brightness settings will return to the default and this random setting will stop the problem where your iPhone brightness keeps dimming.

You can reset all of your iPhone’s settings by following these steps:

    Go to Settings then select General.

    Select Transfer or Reset iPhone.

    Tap Reset and Reset All Settings.

    Enter your password. Press Reset All Settings to confirm.

reset iPhone wrong settings

12. Update Your iPhone to the Latest iOS Version

The problem where your iPhone screen keeps dimming may be caused by your iPhone not being up to date. Sometimes iPhone updates are brought out to fix common problems that iPhone users are having. Since the latest iOS 16 has several new great festures, you should update your device to the iOS 16 version:

To update your iPhone, follow these steps:

    Plug your iPhone into a power source and ensure it is connected to wi-fi.

    Open Settings then General. Press Software Update. Then you can check your iPhone's iOS version.

    Tap Update iPhone to iOS 16 option, then click Download and Install Now button to initiate the process.

update iPhone

    If there is an update available, it will appear on the screen.

    Tap Install Now to install the update.

13. Cool Down Your iPhone

Actually, your iPhone screen keeping dimming issue must be done after above methods, but there is still a last one for you. Your iPhone may be overheating when you use it, causing your iPhone screen brightness keeping dimming. You can try cooling down your iPhone to see if that will resolve the dimming problem.

You can try these tips to cool down your iPhone:

    Remove the case.

    Don't leave it in direct sunlight.

    Avoid playing games that cause the iPhone to heat up excessively.

    Turn off Location Services.

    Turn off Bluetooth.

    Avoid charging your phone until it cools down.

    Once your iPhone cools down, the screen should return to its normal brightness level.

To Sum Up

Overall, the issue where your iPhone screen keeps dimming can be caused by a few different hardware and software issues. It can sometimes be resolved easily by simply turning off features like auto brightness or night shift. Sometimes your iPhone will require a full restart or reset of your settings.

If you try all of these steps and your brightness doesn't work then you might want to use the useful tool WooTechy iPhixer. It will help restore and update your iPhone quickly to resolve the brightness problem, with 100% success rate and without data loss.

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