Owner’s Code Guide
How to Change the Code on a Master Lock Box
For a master lock box reset, call us if you’re locked out; if you have the current code, open the box and check for its reset control before changing the combination.
- Use the current code to open the box before resetting it
- Test the new combination while the compartment is open
- Master Lock support provides model-specific manuals
- We come to you in Springdale and Northwest Arkansas
Before a Master Lock Box Reset: What You Need
A reset is meant for a lock box you can already open with its current combination. Keep the compartment door open until you have confirmed that the new code works.
- The current combination — Use the existing code to open the compartment in the usual way. If you do not know the code or cannot open the box, stop here rather than trying to force the reset.
- The model number — Check the box or its packaging for the model number. Master Lock makes different lock box designs, and the position and movement of the reset control can vary.
- A new combination you can remember — Choose a code that is easy for you to recall but not obvious to someone who knows you. Avoid details that others can readily associate with you.
- A reset lever inside the compartment — The steps below apply to models with an internal reset lever. For a box with a different control, use the owner instructions for that model in Master Lock support rather than forcing or guessing at the mechanism.
How to Reset a Master Lock Box Code With a Lever
On a reset-lever style box, the new code is set while the compartment is open. Keep the key compartment empty or hold its contents clear of the reset control so nothing blocks the lever.
- Set the current combination — Turn the combination dials to the code that currently opens your box. Align each number carefully with the opening mark.
- Open the compartment — Operate the release as you normally do and open the compartment door. If the door does not open with the known code, do not continue by pressing or prying at the reset mechanism.
- Find the reset lever — Look inside the open compartment for the small reset lever. Note its original position before moving it; the lever should move without force.
- Move the lever into reset position — Push the lever to the left and down, where it stays in the reset position. If your lock box has a different control or the lever will not move smoothly, stop and check the instructions for its model.
- Set the new combination — Turn each dial to the number you chose, aligning the digits with the opening mark. Make sure every wheel is fully set before you move the lever back.
- Return the lever to its starting position — Push the lever to the right and up, back to its original position. This completes the code change on the lever-style design.
- Test before closing the box — With the compartment still open, scramble the dials and then enter your new code. Operate the release; the door should open. Repeat the test once more before closing the compartment and putting keys inside.
Need help now? (904) 915-9322
Why a Master Lock Box Code Reset May Not Work
A reset that does not take may point to a model mismatch or a control that did not return to its proper position. Check these details while the compartment is still open.
The box uses another reset design
Not every Master Lock box has the same lever or reset sequence. Compare the model number with its owner instructions before trying another procedure.
The lever did not return fully
If the lever remains between positions, the new code may not have been set. Do not force it; check whether anything inside the compartment is obstructing the control.
One or more dials are misaligned
A wheel that sits between digits can make the code difficult to enter consistently. Align each dial with the mark, then scramble and enter the new code again while the door remains open.
The new code was not tested before closing
Closing the box before testing can leave you unable to confirm the reset. Keep the compartment open until the new combination releases it reliably.
When a Master Lock Box Needs a Locksmith
Call a professional if you do not have the current combination, the box will not open with the known code, the reset lever sticks, or the new combination will not release the open compartment. Do not pry the box or force its controls; that can damage the mechanism without solving the code problem. We provide mobile locksmith service in Springdale and Northwest Arkansas, and you can contact us for help. For other Master Lock products, see our Master Lock locksmith page.
Need help now? (904) 915-9322
Frequently asked questions
Can I change the combination while the Master Lock box is closed?
No. For the lever-style procedure, you must open the compartment with its current combination before you can reach the reset lever. Keep the compartment open until you have tested the new code.
Will changing the code affect the key inside the lock box?
The reset changes the combination used to open the compartment; it does not change the key itself. Remove the key before resetting so it cannot get in the way of the control or the code test.
How can I check that the new Master Lock box combination works?
Leave the compartment door open, scramble the dials, and enter the new code from the beginning. Operate the release and confirm it opens before you close the box.
What should I do if I forgot the current code?
The reset steps require the compartment to be open, so they are not a way to open a box when you do not know its code. Check the owner instructions for your model or contact a locksmith rather than forcing the lock.
Need Help With Your Lock Box?
If the box will not open with its current code or its reset control is stuck, contact us for mobile locksmith help in Springdale and Northwest Arkansas.