How to Fix Samsung Galaxy Alarm Not Going Off

Samsung Galaxy alarm not going off is usually caused by muted alarm sound, disabled alarm permissions, bedtime or Do Not Disturb rules, battery restrictions, or Clock app glitches. To fix a Samsung alarm not ringing, check alarm volume, confirm the correct alarm settings, allow Clock app notifications, and remove any battery optimization affecting One UI alarm behavior.

🤔Note:

If a Samsung alarm appears on screen but makes no sound, the most common causes are low alarm volume, a silent ringtone selection, or blocked Clock notification channels.

Steps

Check the alarm sound and volume

Open Clock > Alarm and select the affected alarm. Confirm the alarm is turned on, a ringtone is selected, and Alarm volume is raised under Settings > Sounds and vibration > Volume.
Review the exact alarm settings

Make sure the alarm is set for the correct day, time, AM/PM format, and repeat schedule. Confirm Vibrate, Alarm sound, and Snooze are configured as expected.
Allow Clock notifications and alerts

Go to Settings > Notifications > App notifications > Clock. Enable notifications, lock screen alerts, and sound. A blocked notification channel can cause a Galaxy alarm silent issue on some One UI versions.
Disable battery restrictions for Clock

Open Settings > Battery > Background usage limits and remove Clock from sleeping or deep sleeping apps. Then check Settings > Apps > Clock > Battery and allow normal background activity.
Update and reset the Clock app if needed

Update the Clock app and One UI software. If the problem continues, clear Clock app cache under Settings > Apps > Clock > Storage. Re-create the alarm after clearing cache.

💡Protip:

Test one alarm a few minutes ahead after every change so you can confirm whether the fix worked before relying on your normal morning schedule.

Common Issues and Fixes

Issue	Likely Cause	Fix
Alarm shows on but makes no sound	Alarm volume is low or ringtone is set to silent	Raise alarm volume and select a built-in ringtone again
Alarm works some days but not others	Repeat days or time settings are incorrect	Edit the schedule and verify the selected days carefully
Alarm does not ring during sleep mode	Do Not Disturb or Bedtime mode is blocking alerts	Add Clock alarms as an exception in Do Not Disturb settings
Alarm fails after power saving changes	Battery optimization pauses Clock in background	Remove Clock from sleeping apps and disable aggressive battery limits
Alarm screen appears late or inconsistently	Clock app cache or system bug is interfering	Clear Clock cache, reboot the phone, and install pending updates

Quick Tips

Bluetooth audio check: A Bluetooth device can make alarm audio seem quieter if media and alert behavior changed after pairing. Test one alarm with Bluetooth turned off.
Use one alarm app: Third-party alarm apps may conflict with Samsung Clock on some devices. Keep one primary alarm app active.
Correct time settings: System time changes can break alarms after travel or manual time edits. Enable Automatic date and time.
Phone power state matters: A fully powered-off phone will not trigger a normal alarm unless the model explicitly supports it.

Why is Samsung alarm not ringing in Do Not Disturb mode?

Samsung alarms usually bypass Do Not Disturb, but custom rules can block them. Check Do Not Disturb exceptions and confirm Clock alerts are allowed.

How to fix alarm issues after a One UI update?

Restart the phone, update the Clock app, and re-create the alarm manually. Many fix alarm One UI problems come from changed notification or battery settings after the update.

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