Also, if you’ve acquired a previously owned Defiant lock or you think someone is spying on your existing code, you want to change it to ensure no one else can change the lock programming.
However, you need to change the default Master Code to ensure security. This code allows you to put the lock in programming mode and then make changes to the lock programming. How to Change the Master Code on a Defiant Electronic Lockīefore we head over to the instructions, keep in mind that a new Defiant lock comes with a default 6 digits Master Code- 123456.
