Optical fingerprint sensors may experience gradual degradation over extended use. If authentication failure rates increase despite proper cleaning and enrollment procedures, the sensor may be approaching the end of its service life and require professional evaluation or replacement.
If you have tried all the above and still face "Authentication Failure," the hardware may be failing. Contact support if:
: If cleaning doesn't work, delete and re-register the problematic user's biometric data. Sensitivity Settings zkteco authentication failure solution best
When facing a ZKTeco authentication failure, follow this systematic approach:
If the device says "Authentication Failure" instantly without trying to scan, the "Liveness Detection" is too strict. Contact support if: : If cleaning doesn't work,
Need a specific model guide? Leave your ZKTeco model number (e.g., K40, SF1000, FaceDepot 790) in the comments for a tailored troubleshooting checklist.
Install the device at eye level and ensure proper, stable indoor lighting. Avoid direct sunlight or strong backlighting. Go into the device's self-test menu to check whether the color and infrared cameras are capturing images correctly. Leave your ZKTeco model number (e
He used a soft, lint-free cloth to gently wipe the sensor.
This guide addresses the most common causes of authentication failures (fingerprint, face, or RFID card) on ZKTeco devices (e.g., attendance machines, access control panels).
I can provide the exact menu paths and configuration steps for your setup. Share public link