How to Change the Combination on a Sentry Safe
Published Date: Oct 7, 2025
A fresh code can be the difference between “I hope” and “I know it’s secure.” In this Sure Lock & Key guide, we explain how to change the combination on a Sentry Safe in clear steps you can follow at home. New to safes? Start with the importance of safe installation so the keypad and bolt work as they should, then update the factory code. We’ll flag common hiccups and simple fixes along the way. Have a minute to tighten security today? Stick with this guide and you’ll be done in a few steps.
Steps to Change the Code on a Sentry Safe with an Electronic Keypad
If you need to change the code on a Sentry Safe, the electronic keypad models make it quite simple. You’ll first need your Sentry Safe factory code — it’s usually printed on the back page of the owner’s manual. No manual and dealing with a lost Sentry Safe combination? You can often retrieve the code from the manufacturer with proof of ownership.
To begin the Sentry Safe reset combination process:
- Open the safe door using the current code.
- Find the small reset/program button inside the door near the hinge.
- Press and release the reset button. You should hear a beep or see a light flash on the keypad.
- Within a few seconds, enter your new five-digit code into the keypad.
- Press the “#” or “P” key (depending on your model) to confirm the new code.
- Test the new combination a few times with the door open to make sure it works correctly before locking it. If the keypad is unresponsive, a quick battery swap can reset the Sentry Safe keypad functions. Try fresh batteries, wait a minute, then re-enter the factory code with the door open.
If your Sentry Safe won’t open after a code change, stop before you scratch the dial or jam the bolt. The next best step is right here: Can a locksmith open a safe? You’ll see how a Sentry Safe locksmith opens the unit without damage. Need help today? Sure Lock & Key keeps it simple and gets you back on track.
Guide to a Sentry Safe Dial Combination Reset
For those with a traditional dial lock, a Sentry Safe dial combination reset takes a little patience and the original change key that came with your safe. The process is secure by design, so you’ll follow a specific sequence rather than setting a new code like on a keypad.
How do you change the combination on a Sentry Safe? Keep the door open and follow these steps:
- Use the existing combination to open the safe door.
- Dial the current combination again, but stop when the last number aligns with the change index on the dial ring (usually to the left or right of the main opening index).
- Insert the change key into the keyhole on the inside of the door. Turn it to the “change” position.
- Now, set your new combination by turning the dial, making sure to align each new number with the change mark.
- Turn the change key back to its original position and remove it.
- Before closing the door, test your new combination several times to make sure it works properly.
Lost the change key or factory code and searching for how to open a Sentry Safe without the combination? Read our blog “Can a locksmith open a safe without the combination?” to learn what a professional can do.
Summing Up
Security stays simple when you know how to change the combination on a Sentry Safe. Keep the factory code/change key secure, test new codes with the door open, and recheck after a move. For placement and mounting best practices, see safe installation tips. If the code won’t take or the dial binds, don’t force it — small mistakes can lock you out.
Sure Lock & Key offers safe & vault locksmith services that open units without damage, reset codes, and sort out sticky keypads or binding dials. With 35+ years in the field, we show up prepared, explain options in plain English, and leave your safe working smoothly. Ready to wrap this up the easy way? Give us a call.