Brightness Keeps Going Down On IPhone Screen? Try These Fixes

Auto-brightness is a great feature that can help automatically manage your iPhone’s brightness depending on a different environment and lighting conditions. But, sometimes, when you’re outside in the sun and open your iPhone, you realize the screen keeps dimming repeatedly even when auto-brightness is turned off.

Occasionally, the sensor malfunctions to accurately detect the environment, creating the screen dimming issue. It can happen because of a software bug, or you have enabled the features that control the brightness. However, you can disable this feature and control brightness manually. 

This article will cover the possible causes and fixes you can use to solve your issues with auto-brightness.

Why is iPhone Screen Dimming With Auto-brightness Off

There are several causes for iPhone screens to keep dimming with auto-brightness off. Here are the possible causes that might lead to this issue. 

  • Device Overheating: Your iPhone screen will automatically dim even though you have disabled the auto-brightness. It will dim once your device temperature reaches more than 40°C. This is done to protect your iPhone from physical damage.
  • True Tone: If you have turned off the auto-brightness, but your True Tone feature is on your iPhone. Then, it can adjust the brightness according to the environment, just like auto-brightness.
  • Night Shift: Another possible cause for your iPhone to keep dimming would be if you have turned on the Night Shift. This feature will reduce blue light per your scheduled time and shift to night brightness.
  • Low Power Mode: Your iPhone screen brightness will drop if you switch to Low Power Mode to save your battery. 
  • Low Battery: If your iPhone is running out of your battery, it’s normal to drop brightness levels. This is done to save your battery to use for a longer time.

How to Fix iPhone Screen From Keep Dimming

You don’t need to worry if your iPhone screen keeps dimming. It can happen if you have turned on Low Power Mode or other features. You can easily fix this by simply rebooting or updating your iPhone. Here I have compiled some quick fixes you can use to stop your iPhone from dimming.

Turn Off Auto-Brightness

The first thing you need to ensure is whether your Auto-brightness setting is turned on or not. Auto-Brightness helps adjust the brightness levels depending on your surroundings. 

Here’re the steps to turn on auto-brightness settings on your iPhone:

  1. Open Settings.
  2. Scroll down and Go to Accessibility.
    Scroll down and Go to Accessibility
  3. Tap on Display & Text Size.
    Tap on Display & Text Size
  4. Scroll down and Turn off the Auto-Brightness.
    Scroll down and Turn off the Auto-Brightness

Turn Off Night Shift

If you have enabled the Night Shift, this will automatically switch your display to warmer color as per your scheduled time, reducing your iPhone’s brightness. You may have unintentionally set the feature to be enabled at the wrong time or during the daytime making your iPhone brightness dimmer. 

  1. Open Settings.
  2. Go to Display & Brightness.Go to Display & Brightness
  3. Tap on Night Shift.Tap on Night Shift
  4. You can check your scheduled time.
  5. Also, you can turn off Scheduled & Manually Enable Until Tomorrow.

Turn Off True Tone

True Tone can also act as an auto-brightness feature that uses sensors to adapt the color and brightness of your display based on the lighting conditions around you.

It’s a hit-and-miss feature that doesn’t always work effectively, causing fluctuations in the brightness of your iPhone’s display. Turning off True Tone will stop your display from fluctuating and will resolve the dimming problem. 

  1. Open Settings.
  2. Go to Display & Brightness.Go to Display & Brightness
  3. Tap on the Toggle Switch button to turn it off.Tap on the Toggle Switch button to turn it off

Or, you can try these steps to turn it off from the control center.

  1. Scroll down the screen from the top right corner to open the control center.
  2. Long-Press on the Brightness slider.
    Long-Press on the Brightness slider
  3. Tap on True Tone at the bottom right.
    Tap on True Tone at the bottom right

Disable Low Power Mode

It can be a great feature if you run out of juice on your iPhone as it preserves the battery by disabling some other features and reducing the background activities. However, screen brightness consumes most of the battery. The first thing low power mode will do is reduce your iPhone’s brightness so that it can last longer.

If you have turned on Low Power Mode, consider disabling this feature. Once you turn this off, your display will be back to normal. 

  1. Open Settings.
  2. Tap on Battery.
    Tap on Battery
  3. Click on the Toggle switch button to turn it off.
    Click on the Toggle switch button to turn it off

Or, you can open the control center and click on the low power mode icon to turn it off.

Disable Zoom Filter

If you have accidentally enabled this feature. Then, disabling the zoom filter can also work if your screen keeps dimming even without auto-brightness. To turn this feature off,

  1. Open Settings.
  2. Scroll down and Tap on Accessibility.
    Scroll down and Go to Accessibility
  3. Go to Zoom.
    Go to Zoom
  4. Check whether the Zoom filter is on or not.
  5. If yes, then set it to None.

Turn Off Auto-Lock

This Auto-Lock will dim the screen before your iPhone is about to get locked. This feature is useful, too, as it will lock your device if you leave it idle for more than 30 seconds or as per your setup time. You can turn this off by following the given instructions.

Note: When in Low Power Mode, your iPhone is auto-lock which is restricted to 30 seconds.

  1. Open Settings.
  2. Go to Display & Brightness.Go to Display & Brightness
  3. Click on Auto-Lock.
    Click on Auto-Lock
  4. Set it to Never. If you don’t want your iPhone to dim before the screen gets locked. 

Restart Your iPhone

Restarting is the one that can solve almost all common bugs. It forces your iPhone to end all the previous tasks and begin with new ones. Restarting can also fix this problem of dimming.

You can power off your iPhone device using the steps below:

  1. Press and hold down the power button.
  2. Swipe to the right to power off. 
  3. Now, Press and hold down the power button for 3-4 seconds.
  4. Apple logo will appear, which means it is turning on.

Here’re the steps to force restart your iPhone:

  1. First, Tap once on Volume up and Volume Down, then hold the power button until the screen goes black.
  2. Once the screen goes black, leave it for 5 seconds.
  3. Then, press the power button until you see the Apple logo.

Cool Down Your Device

If you are using your iPhone excessively without giving it a break, your phone will heat up. Also, if you are using it while charging and tons of apps are loaded in the background, it will increase your device temperature, forcing it to drop its brightness. 

You can cool down your iPhone quicker by closing all the background apps, taking off the phone’s case, and turning on Airplane mode. Switching it off can also work to cool down your iPhone.You will also get a warning when your iPhone gets excessive heat.

At such times you won’t be able to use your iPhone. Once it returns to normal temperature, your brightness level will also turn bright.

Update Your iPhone

If your screen keeps dimming, although your auto-brightness is off, it can be fixed by software update if it’s a problem caused by iOS bugs. When updating your iPhone, Apple adds new features and fixes previous software bugs. So, consider updating your iPhone if you haven’t. 

  1. Open Settings.
  2. Click on General.
    Click on General
  3. Tap on Software Update.Tap on Software Update
  4. Tap on Download and Install if the software is available. 
    Tap on Download and Install if the software is available

Resetting Your iPhone

Although you have tried previous methods, this can be another option you can consider if your device’s brightness keeps going down. Resetting can help reinitialize the system’s settings and delete all the previous data.

The resetting process on iPhone involves two major steps, first, you need to backup your device to iCloud and then erase all the contents on the iPhone.

Here’re the steps to backup your device to iCloud:

  1. Open Settings.
  2. Click on Apple ID at the top of the menu.
    Click on Apple ID at the top of the menu
  3. Tap on iCloud.
  4. Scroll down and Tap on “Back up Now.”
    Scroll down and Tap on Back up Now
Note: Make sure to back up your files to iCloud or third-party storage before resetting your iPhone.

Follow the steps below to reset your iPhone:

  1. Open Settings.
  2. Click on General.
  3. Scroll down and Click on Transfer or Reset iPhone.
    Scroll down and click on Transfer or Reset
  4. Click on Erase all content and settings.
    Click on Erase all content and settings
  5. Once you go there, Your iPhone will ask you to enter your passcode. Then, hit “Erase” to confirm.
  6. It will take a while to reset your device. Once it is reset, it will boot as a new device.

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