The Date Code and Closer Size are stamped in the backside of the closer body.
Closer Size:
If the number is "1", the closer is a 2031 or 5031.
If the number is "3", the closer is a 2...
A freeze credential disables the credential reader. After a freeze credential has been used on a lock, only a pass through credential will operate the lock. To take the lock out of freeze mode...
When trying to program a CM lock, it may display an error code with a solid green light and 10 read flashes. This indicates the lock has already been programmed with computer software and manual pr...