If you don t open the door within 4 seconds then the lock will engage again and you ll have to retype the code.
Sentry safe locked with door open.
The lock must have jammed.
Try looking for a small plastic button on the hinge side of the door push it in after the combo it is a deadlock type of feature.
To open a sentry safe with combination you can follow the below steps.
What can sometimes happen if locked when the door is open is that the rods are able to travel a lot further than they do normally and can get stuck.
It should be noted that this kind of sentry safe is designed specifically to protect against fire damage not burglars with rare earth magnets in socks.
Pull the handle on the safe down within 4 seconds of typing in the code.
When you enter the code and the light turns green grab the handle next to the keypad and rotate it downward so the bolts come undone.
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You could thry a light tap with a hammer as you unlock it.