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.
Sentry safe locked with door open.
Pull the handle on the safe down within 4 seconds of typing in the code.
If you don t open the door within 4 seconds then the lock will engage again and you ll have to retype the code.
Other safes including most gun safes on.
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You could thry a light tap with a hammer as you unlock it.
Open the door of the safe and ensure those shipping screws have been removed if any find the combination code on the user manual usually there is a sticker on the user manual if you are using a dual key combination model of.
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.
To open a sentry safe with combination you can follow the below steps.
You could try a little graphite into the mechanics of the bolts to see if you can free them.