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.
Sentry safe locked with door open.
Pull the handle on the safe down within 4 seconds of typing in the code.
You could try a little graphite into the mechanics of the bolts to see if you can free them.
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.
Other safes including most gun safes on.
If you don t open the door within 4 seconds then the lock will engage again and you ll have to retype the code.
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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.
You could thry a light tap with a hammer as you unlock it.