How to Change the Combination on a Combination Lock: Step-by-Step

Published: Jan 8, 2026

Updating the code on your combination lock is one of the simplest ways to improve security — especially for gym lockers, home storage, and outdoor gates. If you’ve forgotten your code, just got a new lock, or want to update it for safety, learning how to change the combination on a combination lock can help you avoid headaches down the road. Below, Sure Lock & Key outlines simple steps for different lock types and shares when it might be best to get help from a trusted residential locksmith.

Why and When to Change the Code on a Combination Lock

There are plenty of everyday reasons to reset your combination lock code — and it’s one of the simplest ways to improve security:

You’re still using the factory default, like 0-0-0 or 1-2-3, which is easy for anyone to guess.
You’ve shared your code with friends, coworkers, or family and want to limit access moving forward.
You forgot the combination lock code and need a fresh start with something memorable.
The dials feel off or jammed, which could signal wear or potential failure.
You use the lock regularly — changing the code from time to time adds an extra layer of protection.

Taking time to change the lock code keeps your property secure — and gives you peace of mind.

Common Methods: How to Change the Combination on a Combination Lock

The reset process depends on your lock type. Here are four common methods for changing the combination on a combination lock.

Method 1: Shackle Rotation (Most Padlocks)

Open the lock using the current combination or the factory default (usually 0-0-0). Pull up the shackle and rotate it 90° or 180°, depending on your model. Press it down into the body and hold. While holding, turn the dials to your new code. Release the shackle and test the combination.

How to Change the Combination on a Combination Lock

Method 2: Reset Button or Tool (Cable & Travel Locks)

Open the lock and find the small reset button or hole, usually on the side or back. Press and hold it (or use a reset tool), then rotate the dials to your new combination. Release to save the code. This method is common for cable locks, suitcase locks, and small 3-digit models.

Method 3: Reset Lever (Wall-Mounted Key Safes)

Open the lock using your current code. Inside, pull the reset lever into the “Set” position, then adjust the dials. Once done, return the lever to its original spot.

If your lock is part of a locker system, you might find it helpful to review our guide on how to use a locker combination lock.

Method 4: Reset Key (Heavy-Duty Padlocks)

Some high-security padlocks require a reset or “change” key. Open the lock and insert the key into the reset slot. Turn to enable reset mode, set your new combination, then turn the key back and remove it. Test the new code to confirm.

Helpful Tips for Resetting a Combination Lock

Tip 1: Always make sure your lock is open before attempting to reset the code. If you’re not sure how to open your lock, take a look at our simple guide on how to open a combination lock.

Tip 2: If you’re using a new lock, try the default code first. Most locks come preset to 0-0-0 or 1-2-3.
Tip 3: Double-check that you’re familiar with how your specific lock opens and closes — this helps avoid mistakes during the reset.
Tip 4: Choose a new code that’s easy for you to remember but hard for others to guess (avoid birthdays or repeating numbers).
Tip 5: Test the new combination a few times before locking it shut to confirm it works correctly.
Tip 6: Store your new code in a safe place — a note, a phone app, or a password manager can help you avoid future lockouts.

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Can’t Reset Your Combination Lock? Sure Lock & Key Is Ready to Help

Most of the time, resetting a combination lock is quick and simple — but not every situation goes according to plan. If your lock won’t reset, you’ve forgotten the code, or you’re dealing with a more advanced model that doesn’t use a visible reset method, it might be time to bring in a professional.

Sure Lock & Key has supported homeowners, businesses, and property managers across the U.S. with lockouts, code resets, and all types of lock-related issues — quickly and affordably. Whether you’re securing a gym locker, outdoor shed, or residential gate, our licensed team is ready to help with fast, friendly locksmith services you can trust.

Don’t stress over a stuck lock. Contact Sure Lock & Key today and get the peace of mind you deserve.

Frequently Asked Questions

Can you change the combination on a combination lock?

Yes, most locks are designed to allow code changes using a reset lever, button, or rotation method, depending on the type.

How do I change the combination on a Master Lock?

To reset a Master lock, open it first, rotate the shackle, press it down, set your new code, and release. Specific instructions vary by model.

How to change the combination on a Brinks lock?

Open the lock, locate the reset button (usually on the side or back), press it with a pin, turn the dials to your new code, then release.

How to change the combination on a Schlage door lock?

Schlage locks often require a reset tool or internal access. For full instructions, check our guide on how to change the combination on a Schlage lock.

How do I change the code on a combination lock without the current combination?

Most locks can’t be reset without the current code for security reasons. If you're locked out, searching for a locksmith near me can help you find a professional who can safely open or replace the lock.

Can all combination locks be reset?

Not all locks are designed to be reset. Some low-cost models or one-time-use locks have fixed combinations. Check your lock’s manual or model details to be sure.

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