Owner’s Reset Guide
How to Reset a Master Lock Combination Lock
For a Master Lock combination lock reset, call (805) 977-6159 first if the lock is stuck. If it opens with your known combination, use the steps below for a compatible reset-tool model.
- Open 24 hours a day, 7 days a week
- Mobile locksmith—we come to you
- Within 15 minutes inside San Luis Obispo
- At least a 6-month warranty on parts and labor
What You Need for a Master Lock Combination Lock Reset
These steps are for Master Lock resettable padlocks that have a reset-tool hole and use a reset tool. Other models may use a different process, so check your model’s instructions at Master Lock support before changing the combination.
- The current combination — You need the combination that opens the lock. The reset procedure begins with the padlock open; it does not recover or change a forgotten combination on a closed lock.
- An open padlock — Unlock it with the current combination and keep the shackle open while you set the new code.
- The matching reset tool — Use the reset tool made for your padlock. Check the model instructions if you do not see a reset-tool hole or are unsure which tool fits.
- Your new combination — Choose a code you can remember and write it down somewhere secure before you start. Keep the lock off the hasp until you have tested the new code.
How to Reset a Master Lock Padlock With a Reset Tool
On compatible reset-tool models, the tool changes the combination while the lock is open. Keep the dials steady as you work so each number lands clearly in its setting position.
- Open the padlock — Enter the current combination and pull the shackle open. Do not continue unless the lock opens normally.
- Find the reset-tool hole — Look for the reset opening on the side of the lock body. Insert the matching reset tool fully into that opening.
- Turn the reset tool — Push the tool in and turn it 90 degrees in either direction. Leave it in that position while you set the dials.
- Set the new combination — Turn each dial to one number in your chosen code. Line the numbers up in the lock’s setting window or along its marked line.
- Return and remove the tool — Turn the reset tool back to its starting position, then pull it out. The dials should stay on the new combination.
- Test the new code before use — Close the shackle while the padlock is off the hasp, turn the dials away from the new code, then dial the new code again and pull the shackle. It should release; repeat the reset procedure if it does not.
Need help now? (805) 977-6159
Why a Master Lock Combination Reset May Not Work
Pause rather than forcing the reset tool or dials. Check these common issues before trying the procedure again.
The lock is not fully open
The reset-tool process requires the shackle to be open first. Re-enter the known combination and make sure the shackle releases before inserting the tool.
The model uses another reset method
Not every Master Lock combination lock has a side reset-tool hole. Confirm the model’s owner instructions before turning or pressing any part.
The tool is not seated or turned fully
A reset tool that is not fully inserted may not engage the reset mechanism. Seat the correct tool and turn it 90 degrees without forcing it.
A dial did not land on the intended number
A number between settings can leave the code different from the one you chose. Set each dial carefully, then test the combination while the lock is still off the hasp.
When to Call a Locksmith About a Master Lock
Call a professional if the known combination will not open the lock, the reset tool will not turn without force, or the lock will not accept a new code after you follow the correct model instructions. Our mobile locksmith comes to you, and the service call is $29; the contact page has our details. For related help, see our Master Lock locksmith service information.
Need help now? (805) 977-6159
Frequently asked questions
Can I reset a Master Lock combination if I do not know the current code?
The owner reset procedure described here requires the lock to be open with the current combination. If you cannot open your lock with the code you have, contact a locksmith rather than trying to force or defeat it.
Does resetting the combination work while the padlock is closed?
No. For the reset-tool models covered here, you must first open the padlock with its current combination. Keep it off the hasp until you have tested the new code.
Why does the reset tool not turn in my Master Lock?
The lock may not be the reset-tool type, the tool may not match, or the shackle may not be open. Check the model’s instructions and do not force the tool if it still will not turn.
How can I check that my new combination works?
Test the lock while it is off the hasp: close the shackle, scramble the dials, then enter your new code and pull the shackle. Confirm that it releases before you put the padlock into service.
A Master Lock That Won’t Reset?
Call (805) 977-6159 for mobile locksmith service. We’re open 24 hours a day, 7 days a week.