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If your Sentry Supreme 5330 safe is not opening, there could be a few possible reasons why:
Combination Error: If you are using a combination to open the safe, make sure that you are entering the correct combination. If you have forgotten the combination, you will need to contact Sentry Safe customer service to get assistance on how to recover or reset your combination.
Dead Batteries: If you have an electronic lock on your safe, the batteries may be dead. Replace the batteries and try again.
Jammed Bolts: The locking bolts may be jammed due to incorrect operation or a mechanical problem. Try tapping the safe door gently with a rubber mallet to loosen the bolts and then try to open it.
Mechanical Malfunction: If the safe still does not open, there may be a mechanical malfunction. In this case, you will need to contact a professional safe technician to diagnose and repair the problem.
Note: If you have lost your key, you will need to contact Sentry Safe customer service to order a replacement key.
I have a sentry safe 1250 .83 cubic and I have the key I was using the safe for awhile without the combination and just the key but now the key wont work and someone messed with the combination part which I dont know the combination i dont know what to do and I dont wanna trash this safe