Owner’s Setup Guide
Master Lock Lock Box Reset: How to Change the Code
A Master Lock lock box reset begins with the instructions for your exact model. Use the manufacturer’s intended procedure, keep the box open while setting and testing a new code, and do not force any part.
- Check the instructions for your exact model
- Set and test the code while the box is open
- Avoid forcing buttons or reset controls
- Get mobile locksmith service in Montgomery County
Before a Master Lock Lock Box Reset
Lock box designs and reset procedures can differ by model. Before you begin, confirm that your box supports a changeable code and use its manual rather than relying on directions for a different model. If you do not have the printed manual, look for the manufacturer’s instructions using the model information on your box or packaging.
- The correct model instructions — Find the instructions for your exact lock box. Read the full code-setting procedure before touching a reset control.
- The current code — Have the code that currently opens the box ready if the manual requires it. Do not try to reset or force a locked box using an improvised method.
- Any model-specific reset tool — Some procedures may call for a tool supplied with the product. Use only the tool and method specified in the manual; do not substitute another object.
- A private place to work — Choose a spot where you can handle the box without exposing the code to other people. Keep the box open during the setup and testing steps.
The Safe Steps for Changing the Code
Use the sequence in your model’s manual. The steps below are a general guide, not a replacement for the manufacturer’s directions; skip or adapt nothing that conflicts with the instructions for your particular box.
- Identify the exact model — Check the product information and locate the matching manual. Confirm that it explains how to change the code on your model; not every lock box uses the same reset process.
- Open the box using the current code — Follow the manual’s normal opening instructions and use the code already set on the box. If the box does not open, stop here rather than attempting to reset it while locked or trying to bypass the mechanism.
- Keep the box open — Leave the box open for the entire code-change process. This lets you verify the new setting before you rely on it to secure keys or other items.
- Use the specified reset procedure — Follow the manual’s instructions for the reset control, dial, buttons, or supplied tool on your exact model. Move controls only as directed, and stop if a part resists or the steps do not match your lock box.
- Set your new code — Choose a code you can remember but that is not easy for someone else to guess. Enter or set it exactly as the manual describes, taking care not to leave a control in the reset position if the instructions say to return it.
- Test before closing — With the box still open, follow the manual to clear or release the setting controls, then test the new code as directed. Confirm that the box opens and closes properly before closing it for use. Store the code somewhere secure.
If the Reset Does Not Work
Stop if the process differs from the manual or a control will not move normally. Repeating steps with force can damage the lock box or make it harder to use.
The instructions are for another model
Reset methods can vary between products. Check the model information and make sure you are following the matching manufacturer’s manual.
The box is not open
A code change may require the box to be open first. Do not attempt to reset a locked box with tools or an alternate method; use the normal code procedure or seek help.
A reset control is resisting
Do not force a button, dial, lever, or supplied tool. Stop and review the instructions for the correct position and sequence.
The new code was not verified
If the box was closed before you tested the code, do not assume the change succeeded. Follow the manual’s opening procedure, and contact the manufacturer or a locksmith if you cannot confirm the setting.
When to Call a Locksmith Instead
Call a locksmith if the box will not open with the code you know, the reset control is damaged, or you cannot identify the correct procedure for your model. Do not try to bypass or force the lock. Locksmith Xpress is a mobile locksmith based in Gaithersburg and serves Montgomery County, traveling to your home, car, or business. See our Master Lock locksmith information or contact us to discuss the service you need.
Frequently asked questions
Can I change the code if the lock box is closed?
Follow the manual for your exact model; many code-setting procedures require the box to be open. Do not try to reset or bypass a locked box. If it will not open using the code you know, stop and contact the manufacturer or a locksmith.
Does every Master Lock lock box have a resettable code?
Not necessarily; features and code-setting procedures vary by model. Check the product manual to confirm whether your lock box allows a code change and how to do it.
How can I check that the new code works?
Keep the box open and test the new code using the procedure in the manual before closing it. Confirm that the box operates as intended, then keep the code somewhere secure.
What should I do if I forgot the current code?
Use the manufacturer’s instructions for your model and any normal recovery options they provide. Do not attempt to defeat or force the lock; contact the manufacturer or a locksmith if you cannot open it through the intended process.
Need Help With a Lock Box?
Call Locksmith Xpress at (301) 806-1626. We provide mobile locksmith service in Gaithersburg and across Montgomery County.