The basic steps to reset your Master Lock combination
To change the combination on a Master Lock, you need to open it first with your current combination, then enter the lock's reset mode by turning the dial a specific number of times in a specific direction. The exact process depends on which type of Master Lock you own — the steps for a dial padlock differ from those for a combination padlock with a shackle, and both differ from a Master Lock combination box or cabinet lock.
Most Master Locks cannot be reset without opening them first. This is a security feature: if you lost the lock or forgot the combination, you cannot simply reset it remotely. You will need to contact Master Lock directly with proof of ownership, or cut the lock off and replace it.
Key Takeaways
- You must open the lock with your current combination before you can change it to a new one.
- Dial padlocks and combination padlocks with shackles use different reset procedures, so check your lock's type first.
- The reset process usually involves turning the dial multiple times in alternating directions, then entering your new combination while the lock is in reset mode.
- If you have lost or forgotten your combination and cannot open the lock, Master Lock requires proof of ownership to help you, or you will need to cut the lock off.
Resetting a dial padlock combination
If you own a standard Master Lock dial padlock, open it with your current combination first. Once it is open, you are ready to enter reset mode.
Turn the dial at least three full rotations to the right (clockwise). Stop on any number. Then turn the dial to the left (counterclockwise) and stop on any number. Turn the dial to the right again and stop on a third number. This sequence clears the lock's memory and puts it into reset mode.
While the lock is still open and in reset mode, turn the dial to the right and stop on the first digit of your new combination. Turn the dial to the left and stop on the second digit. Turn the dial to the right and stop on the third digit. Close the shackle (the U-shaped metal part). The lock is now set to your new combination.
Test the new combination by closing the lock completely and opening it again with the numbers you just entered. If it does not open, repeat the reset process and try again.
Resetting a combination padlock with a shackle button
Some Master Lock combination padlocks have a small button or lever on the shackle instead of a dial. These locks reset differently.
Open the lock with your current combination. Locate the small reset button or lever on the shackle — it is usually a tiny red or black button. While the lock is open, press and hold this button. While holding it, turn the dial to your new first digit, then release the button. Press the button again, turn to your new second digit, and release. Repeat for the third digit.
Close the shackle while still holding the button after entering your final digit. Release the button. Close the lock completely and test it with your new combination.
Resetting a Master Lock combination box or cabinet lock
Combination locks built into boxes, cabinets, or safes follow a similar but slightly different process. You must open the box or cabinet first using your current combination.
Once open, look for a small reset lever or button inside the lock mechanism — the location varies by model. Consult your lock's manual or the Master Lock website for your specific model number to find it. With the lock open, move the reset lever or press the reset button, then turn the dial to set your new three-digit combination. Close the box or cabinet and test the new combination.
What to do if you have forgotten your combination
If you cannot open the lock because you have forgotten the combination, you cannot reset it yourself. Master Lock does not provide a way to bypass a forgotten combination for security reasons.
Contact Master Lock directly with proof of ownership — usually a receipt, photo of the lock with your name visible, or the lock's serial number. Master Lock may be able to help you, though the process can take several weeks. Alternatively, you can cut the lock off with bolt cutters or an angle grinder and purchase a replacement.
If the lock is on a rental property or a storage unit you do not own, contact the property manager or facility operator. They may have a master key or a record of the combination on file.
Common mistakes when resetting a Master Lock
The most common error is not entering reset mode correctly before trying to set a new combination. If you skip the three-rotation sequence or do not complete it properly, the lock will not accept your new combination. Always perform the full reset sequence — three rotations right, then left, then right — before entering your new digits.
Another mistake is not testing the new combination immediately after setting it. Test the lock while you are still at the location where you reset it, not later when you may have forgotten what you entered. If the lock does not open with your new combination, repeat the reset process right away rather than walking away and trying again later.
Do not assume all Master Locks reset the same way. Dial padlocks, shackle-button locks, and built-in cabinet locks all use different procedures. Check your lock's model number and consult the manual or Master Lock's website to confirm the correct steps for your specific lock.
Frequently Asked Questions
Do I need tools to change my Master Lock combination?
No. Changing a combination on a Master Lock requires only your hands and the lock itself. You do not need a screwdriver, key, or any other tool. If you have forgotten your combination and cannot open the lock, you will need bolt cutters or an angle grinder to remove it.
Can I change my combination without opening the lock first?
No. Master Locks require you to open them with your current combination before you can set a new one. This is a built-in security feature. If you cannot open the lock, you cannot change the combination.
What if my new combination does not work after I set it?
Repeat the reset process from the beginning. Make sure you complete all three rotations in the correct directions before entering your new digits. Test the lock immediately after setting it so you know right away if it worked. If it still does not work after a second attempt, the lock may be damaged and you may need to replace it.
Can Master Lock reset my combination if I forgot it?
Master Lock can sometimes help if you provide proof of ownership, such as a receipt or photo with your name. Contact them directly with your lock's serial number. The process may take several weeks. If you need access sooner, cutting off the lock is faster.
Is there a master combination that opens all Master Locks?
No. Each Master Lock has its own unique combination. There is no universal combination that works on all locks. This is why the lock cannot be reset without opening it first.