Question about Sentry Fireproof Safe

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Can not open my safe, sentry 3750

I have the combination and key, neither are working to open my safe. I opened it about a month ago with no problem and battery low lite is not on.

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  • nate619 Apr 17, 2008

    my safe only opened with a key and i obviously lost it..I tried to pick it and open with other keys and all have failed...please help!

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  • Sentry Expert
  • 170 Answers

Sounds like all you might need is a new Sentry Safe battery pack to hold the batteries. As these sometimes short out from leaking batteries.

Posted on Aug 09, 2010

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1 Answer

I have sentry safe ,lost key but I know the combination i have sentery safe wthih combination lock but i do not have key ,i do have combination. how can open the safe


Put the combination in and open the door. You only need the key if the battery goes flat.

You can get a new key here

Key Replacement

How to open without a key

open sentry safe without key Google Search

This kid shows you how to open one by bouncing it on a bed! If it is fixed, you hit it with a rubber mallet on top.

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Open sentry safe key


contact sentry safes customer support or your local locksmith
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How do you open a sentry 1250 combination safe? I have the number


Locksmiths agree If your safe doesn't have a key, skip Step 3.
Turn the dial to zero.
Insert your sentry safe key and turn it until the plunger pops out.
Turn the dial to the left (counterclockwise) three times to the first number of the combination (pass the first number of your combination two times, stopping on it the third time).
Turn the dial to the right (clockwise) two times to the second number of the combination (pass your second number once, stopping on it the second time).
Turn the dial to the left to the last number (stop the first time on your last number).
Pull the handle down; cracking the Fireproof Sentry Safe open.

Jun 06, 2010 | Sentry Fireproof Safe

1 Answer

How do I open the combination lock to my sentry home safe?


Locksmiths advise these Opening instructions for sentry fireproof electronic security safes. Insert the tubular sentry key into the lock to the left of the key pad. Turn the key all the way to the right until the plunger pops out. Press the five-digit factory code. The green Proceed light will come on. Pull the handle down; to crack the sentry door open.

sentry safes opening instructions for 4 # combo locks
Turn the dial to zero.
Turn the dial to the left (counterclockwise) four times to the first number of the combination (pass the first number of your combination three times, stopping on it the third time).
Turn the dial to the right (clockwise) three times to the second number of the combination (pass your second number twice, stopping on it the third time).
Turn the dial to the left (counterclockwise) two times to the third number of the combination (pass the third number of your combination one time, stopping on it the second time).
Turn the dial to the right to the last number (stop the first time on your last number).
Pull the handle down to crack the sentry safe open.

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2 Answers

I have a sentry safe with a key and combination lock i have misplaced my combination now what


Sentry Safe lost combination. First, find your sentry floor safe's Serial Number. The Serial Number is printed on the small label on the right side of safe, on paper tag near bottom hinge, below the cover plate or you can look behind the handle with a mirror. Just note your model # and the serial #.
Sentry Safes express combination research is fast with a next day Service. The email is sent the next business day with the sentry safe combination and opening instructions. Although there is a service charge it's still cheaper then locksmith drilling a Sentry Fireproof Safe open.

Jul 13, 2009 | Sentry Fireproof Safe

1 Answer

Can't open combo/key sentry safe.


You need to contact Sentry, they will send you an emergency unlock code.

Number in US is 1-800-828-1438.

See also:

Lost combination or keys

Replacement Keys and Combinations

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Apr 18, 2009 | Sentry Fireproof Safe

1 Answer

I am unable to open my Sentry Safe S410 with my key. Do I also need a combination?


A good locksmith should be able to help you It sounds like your Sentry Safe is double locked. Now you need the key and combination to open the safe.

Aug 13, 2008 | Sentry Fireproof Safe

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