How to Fix Auto Brightness Not Working on iPhone

Are you facing issues with the Auto Brightness feature on your iPhone? Is Auto Brightness not working properly? In this guide, we will show you how you can fix this issue easily by yourself by following a few proven solutions.

Auto Brightness feature automatically adjusts your iPhone’s screen brightness based on the light around you. Sometimes this feature can stop working due to incorrect settings, temporary system bugs, or software glitches.

Fix Auto Brightness not working on iPhone

Fix 1: Make sure Auto Brightness is turned on

First and foremost, make sure the Auto Brightness feature is enabled on your device.

1. Open Settings and go to General.
2. Here, tap on Accessibility.
3. Tap on Display & Text Size.
4. Turn on the toggle for Auto-Brightness.

If it is already enabled, turn it off and turn it back on again.

Fix 2: Clean the Front Sensors

iPhone uses ambient light sensors located at the front of the device to delete lighting conditions. If the sensor is dirty, covered in dirt, or is blocked by a screen protector, then it can stop working.

You can fix this by cleaning the top part of your iPhone’s screen. Make sure to clean the area around the front camera and Face ID sensors.

Fix 3: Turn Off Low Power Mode

If Low Power Mode is active, then turn it off. Go to Settings -> Battery -> Power Mode -> Low Power Mode -> Off. This should fix the Auto Brightness not working issue on your iPhone.

Fix 4: Restart your iPhone

Restarting the iPhone can fix temporary glitches and get the Auto Brightness feature working properly again.

1. Press and hold the Side button and Volume Up or Volume Down buttons simultaneously.
2. Slide to power off once the slider appears.
3. Wait 10-15 seconds and turn the device back on.

Fix 5: Reset All iPhone Settings

Resetting all settings on your iPhone can solve the Auto Brightness feature not working issue.

1. Open Settings and go to General.
2. Scroll down to Transfer or Reset iPhone.
3. Tap on Reset.
4. Tap on the Reset All Settings option.

Fix 6: Adjust Brightness manually once

Sometimes, Auto Brightness stops working due to calibration issues. You can recalibrate the system by manually adjusting the brightness.

Just access the Control Center and move the brightness slider up and down. After doing so, check if Auto Brightness has started working again.

Fix 7: Check True Tone and Night Shift

If you use display features like True Tone and Night Shift in your iPhone, then turning them off and back on can help refresh display behavior.

You can toggle these settings off and on by going to Settings -> Display & Brightness.

Fix 8: Update iOS

Auto Brightness can stop working due to a software bug. Make sure your iPhone is running the latest version of iOS by going to Settings -> General -> Software Update.

If the Auto Brightness issue persists on your device, then your iPhone might have a hardware issue. Get it checked by visiting an Apple Store or an Apple Authorized Repair Center.

That’s it, one of these solutions should have fixed the Auto Brightness feature not working issue on your iPhone, and the feature should be working again.

Let us know which solution worked for you in the comments below.