The basic steps to reset your Master Lock combination

You can change the code on a Master Lock by opening it with your current combination, then using the reset lever or dial to enter a new one. The exact process depends on which type of Master Lock you own — a dial combination lock, a padlock with a keypad, or a digital lock — because each one has a different mechanism for storing and changing the code.

The most common type people own is the dial combination padlock, which has a small lever or button on the back that you press while the lock is open. For keypad locks and digital locks, you enter a special code sequence while the lock is unlocked to enter "change mode." All of these can be done at home without tools or calling the manufacturer.

Before you start, make sure you have your current combination written down or memorized. You cannot change the code if you cannot open the lock first.

Key Takeaways

  • Dial combination locks require you to open the lock, press the reset lever on the back, and then turn the dial to your new combination three times to set it.
  • Keypad Master Locks need you to open them first, then press and hold a small button or lever while entering your new code on the keypad.
  • Digital Master Locks use a menu system accessed by holding down a button — you navigate to "Change Code" and enter your new combination twice to confirm.
  • Write down your new code and store it somewhere safe, because Master Lock cannot retrieve a forgotten code without proof of ownership and a serial number.
  • If you forget your current code and the lock is closed, you will need to contact Master Lock with proof of purchase or cut the lock off.

Changing the code on a dial combination padlock

Open your lock using your current combination. Turn the dial right at least three full rotations to clear it, then enter your combination as normal. Pull up on the shackle (the U-shaped metal part) to open the lock completely.

Locate the small reset lever on the back of the lock body. It is usually a thin metal tab or button positioned near the bottom of the lock. While the lock is still open, push this lever firmly to the side or press it inward — the exact direction depends on your specific model, but you should feel a small click or resistance when you do it correctly.

Once the reset lever is engaged, turn the dial to your new combination. Do this three times in a row without stopping. For example, if your new code is 15-30-5, you would turn right to 15, left to 30, and right to 5, then repeat this sequence two more times. After the third repetition, close the lock by pushing the shackle down.

Test your new combination by closing the lock fully and then opening it again with the new code. If it does not open, repeat the process — you may not have held the reset lever firmly enough, or you may have made an error entering the sequence.

Changing the code on a keypad Master Lock

Open the lock using your current code. Most keypad locks have a small button or lever on the back or side of the lock body. While the lock is open, press and hold this button for three to five seconds until you hear a beep or see a light flash — this puts the lock into change mode.

Enter your new code on the keypad. Most keypad locks accept codes between four and eight digits. Press the button or lever again to confirm the first entry. You will usually be prompted to enter the code a second time to verify it. If the two entries match, you should hear two beeps or see a green light, which means the new code has been saved.

Close the lock and test it with your new code. If the lock does not respond to your new code, open it again and repeat the process — you may have entered the digits incorrectly or not held the reset button long enough.

Changing the code on a digital Master Lock

Digital Master Locks, including the Master Lock Bluetooth and electronic models, use a menu system instead of a physical reset lever. Open the lock using your current code. Press and hold the button on the front of the lock for five to ten seconds until the display shows a menu or you hear a series of beeps.

Use the arrow buttons or keypad to navigate to an option labeled "Change Code," "Reset Code," or "Settings." The exact menu name varies by model. Select this option by pressing the center button or the button marked "Enter" or "OK."

Enter your new code when prompted. Digital locks usually ask you to enter it twice — once to set it and once to confirm. If both entries match, the lock will beep or display a confirmation message. Close the lock and test it with your new code before you rely on it.

What to do if you forget your current code

If your lock is already closed and you cannot remember the combination, you cannot change the code without opening it first. Master Lock does not have a way to remotely reset a lock or retrieve a forgotten code over the phone.

Your options are to contact Master Lock directly with proof of purchase and the lock's serial number — which is printed on the lock itself — and ask if they can help you. Response times vary, and they may ask you to mail the lock to them. The faster option for most people is to cut the lock off with bolt cutters or an angle grinder and replace it with a new one.

If this is a lock you use regularly, write your new code down and store it in a safe place, such as a password manager, a locked drawer, or with a trusted person who can access it if you forget.

Common mistakes that prevent code changes from working

The most frequent problem is not holding the reset lever or button long enough. A quick press does not always engage the change mode — you need to hold it for a full three to five seconds and wait for the beep or click that confirms the lock is ready. If your new code does not work after you close the lock, open it again and try the process once more, holding the button longer this time.

Another common error is entering the new combination only once instead of three times on dial locks. Dial combination locks require you to enter the sequence multiple times in a row so the lock can register the pattern. If you enter it once and close the lock, the change may not save.

On keypad and digital locks, entering the code too quickly or too slowly can cause the lock to time out and exit change mode. Enter each digit at a normal pace, as if you were typing a text message, and wait for any prompts before moving to the next step.

Frequently Asked Questions

Can I change my Master Lock code without opening it first?

No. You must open the lock with your current code before you can change it. If the lock is closed and you do not know the combination, you will need to cut it off or contact Master Lock with proof of ownership.

What if my reset lever is broken or stuck?

If the lever will not move or feels damaged, the lock mechanism may be worn out. Try opening and closing the lock several times to see if it loosens up. If it remains stuck, the lock may need to be replaced — Master Lock does not repair individual locks, and attempting to force a stuck lever can damage it further.

How many digits can my new code be?

Dial combination locks use three numbers between 0 and 39. Keypad locks typically accept four to eight digits, depending on the model. Digital locks vary — check your lock's manual or the Master Lock website for your specific model's requirements.

Will changing my code erase any other settings on the lock?

On dial and keypad locks, changing the code does not affect other settings. On digital locks with additional features like Bluetooth or alarm settings, changing the code usually preserves those settings, but check your manual to be certain.

What should I do if I change my code but the lock still opens with the old combination?

This usually means the new code did not save properly. Open the lock, wait a few seconds, then close it again. Open it once more with your old code to confirm it still works, then repeat the code-change process from the beginning, making sure to hold the reset button or lever for the full duration and enter the new code the required number of times.