Can Fingerprint Locks Break Down?<\/strong> Like any security system, biometric locks have faults of their own. For example; a lock may fail to recognize a fingerprint that has been scarred or damaged, or it may also fail to function if the lock\u2019s access to power is cut. However, in the fingerprint door lock installation process, a manual key override can help to protect against lockouts.<\/p> <\/div>