I've lost or forgotten the combination to my Master Lock lock. What can I do? Show Does your Master Locklock have a serial number? If it doesn't, we won't be able to help you find your combination because we don't have a record of it. Learn how to find your lock's serial number. If your lock has a serial number, you can recover your combination in one of three ways. You can visit a Master Lock Distributor / Retailer or submit a Lost Combination form. Distributor / Retailer
Submit a Lost Combination Form
Once we receive your request, you will receive your combination in approximately 4-6 weeks. Send a Photo Via Contact Form
We will respond in 7-10 days. Note: If you are an inmate in a correctional facility, you must submit your request on official prison facility letterhead. In lieu of notarization, the Lost Combination Form must be signed by a prison facility official. I lost the combination to my Master Lock Set-Your-Own Combination lock. Can you help me reset it? Unfortunately no. You cannot reset this lock without knowing the current combination. You'll likely need to purchase a new lock. I accidentally reset the combination on my Master Lock resettable combination lock. Now I don't know the correct combination. Can I reset the lock back and assign a new combination? Unfortunately, you cannot reset this lock without knowing the current combination. You'll likely need to purchase a new lock. How can I retrieve my lost combination when my Master Lock lock is attached to a bike, cabinet, locker, or something else? We will not provide lost combinations if the lock is attached to anything. I'm unable to get a legible photocopy of my lock for the Lost Combination Form. What should I do? Try lightening the copy as much as possible. The most important thing is that we can see that the lock is not attached to something. How do I set the combination on my Master Lock 5400D / 5401D Key Safe? To set or reset the combination on your Master Lock 5400D / 5401D Key Safe:
For further guidance on how to set or reset the combination on your lock, please watch our instructional video or see the instruction sheet. 5400D Instruction
Sheet How do I set the combination on my Master Lock 5422D / 5423D Push Button Lock Box? To set or reset the combination on your Master Lock 5422D / 5423D Push Button Lock Box:
For further guidance on how to set or reset the combination on your lock, please watch our instructional video or see the instruction sheet. 5422D Instruction
Sheet How do I set the combination on my Master Lock 5424D / 5425D Spare Key Storage Safe? To set or reset the combination on your Master Lock 5424D / 5425D Spare Key Storage Safe:
Further guidance is available for the 5424D. Please see our instructional video or instruction sheet. Further guidance is available for the 5425D. Please see our instructional video or instruction sheet. 5425D Spare Key Storage Safe Instructional Video How do I set the combination on my Master Lock 5406D Spare Key Storage Safe? To set or reset the combination on your Master Lock 5406D Spare Key Storage Safe:
For further guidance on how to set or reset the combination on your lock, please watch our instructional video. How do I set the combination on my Master Lock 5404DHC Key Safe? To set or reset the combination on your Master Lock 5404DHC Key Safe:
For further guidance on how to set or reset the combination on your lock, please see the instruction sheet. How do I set or reset the combination on my 175 / 176 / 177 / 178 Master Lock Set-Your-Own Combination Lock? To set or reset the combination on your 175, 176, 177, or 178 Master Lock padlock:
For further guidance on how to set or reset the combination on your lock, please watch our instructional video. How do I set the combination on my Master Lock 643D lock? To set or reset the combination on your Master Lock 643D lock:
How do I set the combination on my Master Lock 643DWD lock? To set or reset the combination on your Master Lock 643DWD lock:
For further guidance on how to set or reset the combination on your lock, please watch our instructional video or see the instruction sheet. How do I set the combination on my Master Lock 653D lock? To set or reset the combination on your Master Lock 653D lock:
How do I set or reset the combination on my Master Lock 1550 backpack lock? To set or reset the combination on your Master Lock 1550 backpack lock:
For further guidance on how to set or reset the combination on your lock, please see the instruction sheet. How do I set or reset the combination on my Master Lock 1520D / 1523D / 1524D / 1534D lock? To set or reset the combination on your Master Lock 1520D, 1523D, 1524D, or 1534D lock:
For further guidance on how to set or reset the combination on your lock, please watch our instructional video. Product SupportHow do you unlock a suitcase if you forgot the combination?Push the button on the lock to put pressure on it.
Depending on what type of lock you have, either slide the button to the open position or pull down on the lock itself like you're trying to open it. This should put the mechanism into the "open" position on the inside, even though you can't open it yet.
How do I reset my bag lock if I forgot my password?Often, the lock will have a little reset button on the bottom or side of the lock. You may need a paperclip, pen, or pencil to push the button in and begin the resetting process. Put in your new combination. While pressing the reset button, enter your new combination in the lock.
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