Brightness Keeps Going Down on iPhone Screen? – Try These Fixes

iphone screen

Auto-brightness is a convenient feature that adjusts your iPhone’s screen brightness based on different environments and lighting conditions. However, sometimes when you’re outside in the sun and open your iPhone, the screen keeps dimming repeatedly, even when auto-brightness is turned off. This issue can occur due to a sensor malfunction, a software bug, or if certain features controlling brightness are enabled. In this article, we will discuss possible causes and solutions for this problem.

Why is the iPhone Screen Dimming with Auto-brightness Off?

Several reasons can cause the iPhone screen to keep dimming with auto-brightness off. Here are some potential causes:

  • Device Overheating: Your iPhone screen may dim automatically to protect the device from physical damage when its temperature exceeds 40°C.
  • True Tone: If True Tone is enabled on your iPhone, it can adjust the brightness according to the environment, similar to auto-brightness.
  • Night Shift: The Night Shift feature reduces blue light and shifts to night brightness based on a schedule, which can cause the screen to dim.
  • Low Power Mode: Enabling Low Power Mode to save battery life will cause your iPhone screen brightness to drop.
  • Low Battery: When your iPhone’s battery is low, it’s normal for brightness levels to decrease to conserve battery life.

How to Repair an iPhone Screen That Is Always Dimming

iPhone 12 Screen Dimming Automatically

You shouldn’t be concerned if your iPhone’s screen continues dimming. That can happen if you have Low Power Mode or other features enabled. You may easily resolve this by restarting or updating your iPhone. Here are some fast fixes to stop your iPhone from fading.

Turn off Auto-Brightness.

The first thing to check is whether or not your Auto-brightness setting is enabled. Auto-Brightness adjusts the brightness levels based on your surroundings.

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

  1. Go to the Settings menu.
  2. Scroll down to the Accessibility section.
  3. Choose Display & Text Size.
  4. Scroll down and disable Auto-Brightness.

Disable Night Shift

If you set Night Shift, your iPhone’s display will automatically turn to a warmer color at the time you specify, reducing its brightness. You may have inadvertently enabled the feature during an inconvenient hour or throughout the day, causing your iPhone’s brightness to reduce.

  • Go to the Settings menu.
  • Go to Display & Brightness.
  • Choose Night Shift.
  • You can check your scheduled time.
  • You can also disable Scheduled and manually enable Till Tomorrow.

Disable True Tone

True Tone can also function as an auto-brightness feature, adjusting the color and brightness of your display based on the lighting circumstances.

It’s a hit-or-miss function that doesn’t always work properly, producing oscillations in your iPhone’s display brightness. Turning off True Tone will prevent your display from fluctuating and will fix the dimming issue.

  1. Go to the Settings menu.
  2. Go to Display & Brightness.
  3. To turn it off, use the Toggle Switch button.

You can also attempt these methods to disable it from the control panel.

  1. To access the control center, scroll down from the top right corner of the screen.
  2. Long-press the Brightness slider to activate it.
  3. At the bottom right, tap True Tone.

Turn off Low Power Mode.

Low Power Mode

If your iPhone’s battery runs out, this feature can help you save it by disabling several other features and decreasing background activities. The screen brightness, on the other hand, consumes the majority of the battery. The first thing low power mode does is lessen the brightness of your iPhone so that it can last longer.

Consider deactivating Low Power Mode if you have it enabled. After you turn it off, your display will return to normal.

  1. Open Settings.
  2. Tap on Battery.
  3. 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.

Zoom Filter should be turned off.

If you unintentionally enabled this functionality. Then, removing the zoom filter may help if your screen continues to darken even without auto-brightness. To disable this feature:

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

Turn off the auto-lock feature.

This Auto-Lock feature will dim the screen just before your iPhone is about to lock. This feature is also important because it will lock your device if you leave it idle for more than 30 seconds or according to the time you set. You can disable this by following the 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.
  3. Click on Auto-Lock.
  4. Set it to Never. If you don’t want your iPhone to dim before the screen gets locked.

Reboot Your iPhone

How to Reboot iPhone

Restarting is the most typical method for resolving issues. It forces your iPhone to complete all prior tasks before starting new ones. Restarting the computer can potentially resolve the dimming issue.

You can turn off your iPhone by following the steps below:

  • Hold down the power button for a few seconds.
  • Slide to the right to turn off the device.
  • Now, for 3-4 seconds, press and hold the power button.
  • Apple logo will appear, which means it is turning on.

Here’s how to force restart your iPhone:

  • First, press the Volume Up and Volume Down buttons once each, then hold the power button until the screen goes black.
  • Wait 5 seconds after the screen goes dark.
  • Then, hold down the power button until the Apple logo appears.

Allow Your Device to Cool

If you use your iPhone extensively without taking breaks, it will overheat. Also, if you use it while charging and have a lot of apps open in the background, it will raise the temperature of your device, prompting it to reduce its brightness.

Close all background apps, remove the phone’s case, and activate Airplane mode to quickly cool down your iPhone. Turning it off may also help to cool down your iPhone. You will also be notified if your iPhone becomes overheated.

You will be unable to use your iPhone at such times. When the temperature returns to normal, so will your brightness level.

Your iPhone should be updated.

If your screen continues to dim even if you have auto-brightness turned off, it may be repaired by a software update if the problem is caused by iOS problems. Apple introduces new features and fixes existing software faults when you update your iPhone. Thus, if you haven’t already, consider updating your iPhone.

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

Reset Your iPhone

How to Reset iPhone

Even if you’ve tried other techniques, there is another option to explore if your device’s brightness continues to drop. Resetting can assist in reinitializing the system’s settings and erasing all prior data.

The iPhone resetting method consists of two primary parts. First, you must back up your device to iCloud and then erase all of the items on the iPhone.

The following are the steps for backing up your device to iCloud:

  1. Open Settings.
  2. Click on Apple ID at the top of the menu.
  3. Tap on iCloud.
  4. Scroll down and Tap on “Back up Now.”

Note: Before restarting your iPhone, make a backup of your files to iCloud or a third-party storage service.

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
  4. 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.

FAQ Section

How To Make your iPhone Display

Q1: How can I increase my iPhone’s brightness manually?

A: You can manually adjust your iPhone’s brightness by following these steps:

  1. Swipe down from the top-right corner of the screen to open the Control Center.
  2. Find the brightness slider (a sun icon).
  3. Slide your finger up to increase the brightness or down to decrease it.

Q2: Can a screen protector cause my iPhone’s screen to dim?

A: Some screen protectors, especially the ones with a privacy filter or anti-glare coating, may reduce the screen’s brightness. If you suspect your screen protector is causing the issue, try removing it to see if the brightness improves.

Q3: Will a factory reset erase all my data?

A: Yes, performing a factory reset will erase all your personal data, including contacts, messages, photos, and app data. Before doing a factory reset, make sure to back up your data using iCloud or another storage service.

Q4: How do I check if my iPhone is still under warranty?

A: To check your iPhone’s warranty status, you can visit Apple’s warranty status page ( Enter your device’s serial number and complete the verification process to see your warranty information.

Q5: Can I disable the dimming feature in specific apps?

A: Some apps may have their own brightness settings, which can override your iPhone’s system brightness settings. You can check the app’s settings or preferences menu to see if there’s an option to disable or adjust the app’s brightness settings.

Q6: How can I calibrate my iPhone’s ambient light sensor?

A: There isn’t a built-in option to calibrate the ambient light sensor on your iPhone. If you suspect a malfunction with the sensor, it’s best to consult an Apple expert at an Apple Store or an authorized service center for assistance.

Q7: Can I prevent my iPhone’s screen from dimming when watching videos?

A: You can disable the Auto-Lock feature by following these steps:

  1. Open Settings.
  2. Go to Display & Brightness.
  3. Click on Auto-Lock.
  4. Set it to Never.

Keep in mind that this may drain your battery faster, so it’s a good idea to enable Auto-Lock again when you’re not watching videos.

Q8: Can I schedule my iPhone’s brightness to change at specific times?

A: You can schedule the Night Shift, which adjusts the color temperature of your display based on the time of day. This can help reduce eye strain and improve sleep. To schedule Night Shift, follow these steps:

  1. Go to Settings > Display & Brightness.
  2. Tap on Night Shift.
  3. Enable Scheduled and set the desired time range.

This won’t directly schedule brightness levels, but it may help maintain a comfortable brightness setting during specific hours.


There are various reasons why your iPhone’s screen may keep dimming even when auto-brightness is turned off. Factors such as device overheating, True Tone, Night Shift, Low Power Mode, and the low battery can all contribute to this issue.

To resolve the problem, you can try a combination of the solutions provided, such as disabling specific features, adjusting settings, rebooting your device, updating your iPhone’s software, or performing a factory reset.

By following these recommendations and referring to the FAQ section for additional information, you should be able to address the screen dimming issue and enjoy a better user experience with your iPhone.

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