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Sentry safe blinks error when I put in code that previously was working but I just changed battery

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Vincent Migliore

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  • 36 Answers

Put the old battery back in and see what happens.

Posted on Oct 09, 2019


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  • 10 Answers

SOURCE: defalt code for sentry safe 5 digits

You'll need to go here:

There is no "default code", but they do keep the serial number and code on file, for just this purpose.

Posted on Feb 18, 2008



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SOURCE: how to cahnge the battery on a sentry safe

There is a small opening on the front number panel of safe. Use a small hex screwdriver or pin to insert into opening. It will open up the front panel (slide panel to right to take off) showing you 4 AA batteries. Just replace and close panel. Very simple to do. I wish the manual show me how. Instead of trying to figure it out for hours.

Posted on Sep 23, 2008


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SOURCE: how to change the battery of my sentry safe model v260

You must replace the batteries located in under the keypad.

Use a large paperclip to unlock the cover. Push the paperclip into the small hole while at the same time, sliding the battery cover to the right. Gently remove the battery housing and replace batteries. You will have to reset your password again, but can find the directions to do so by going to the Sentry site:,

Posted on Oct 04, 2008


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SOURCE: changing the combination

Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} You must have the factory combination in order to change the combination that was added to the safe and the factory combination can not be erased if that is the combination you are trying to erase.

All you have to do is press program & type in the factory code 2 times & that will erase the number you created.

Then to add a new combination all you have to do is: press program followed by 5 new numbers. Then to see if they new number works, just type in the new combination & the green light should come on & you have 4 seconds to turn the handle

Posted on Nov 25, 2008


  • 1 Answer

SOURCE: Changing the code on my Sentry Safe S3877

how to change the on sentry safe s3877

Posted on Jan 20, 2009

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1 Answer

Know combination, but every time I enter it, why is there an error light?

If you repeatedly get an error code when entering your combination I would first ask if your batteries recently went all the way dead ? If yes then possible that the data for your combination was lost. In your user manual for your safe is a factory code for your safe. If you did not change your factory code when you set up your safe then this will work to get you into your safe. If you did change the factory code and do mot have that number either then the only way to get into your safe is to contact Sentry Safe customer ssrvice. They will be able to take care of you but it is a process.

Apr 14, 2016 | Sentry Fireproof Safe

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Sentry safe reset instructions

You can get help here, but you will need to prove ownership...

Jul 14, 2014 | Home Security

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I have changed the battery in my sentry 1610, no I can't open it with my pin-Nr..

if you have changed the batteries, the code may have reset itself to the default code.
you should be able to find this in the instruction manual or on the manufacturers website.

i am sorry i cannot give you the codes myself, but i do not feel it is appropriate to put default codes for a safe on an open website

Feb 28, 2011 | Sentry Safe Fire-Safe Home/Office Safe

1 Answer

We have a Sentry safe model number SC 3877. We just changed the batteries. We are imutting the correct code, the light turns green but does not give the 1 beep and we cannot open the safe. If we put in...

Its the most reazonable answer and it worked!!!!!!! dial the code and tap on the handle so it would get lose

Jan 16, 2011 | Sentry Fireproof Safe

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S3517sentry safe need to reset

Press: Program 2x, enter a digit user-code (green led remains on), enter the 5 digit user pin (of your choice except 00000). After 5 digits entered, the green LED turns off.

May 11, 2009 | Sentry Fireproof Safe

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Sentry safe, enter codes and nothing

Motorola IC #MC68HRC705 will not reset. Chip is most likely bad. Time to throw this safe out...Thanks for your answers. George

Mar 25, 2009 | Sentry Fireproof Safe

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When i put my last digital number in the red light comes on and error blinks i have a safe with the key and then you put 5 digits in and turn the lever then it opens the sentry safe A5 406618

When the red light blinks that means you are entering the wrong code. If your batteries went dead the safe delets the user code Check your owners manual for the default factory code number. Programing instructions.

Feb 27, 2009 | Sentry Fireproof Safe

1 Answer

Error light comes on when keying combination code

Try new batterys ,also sometimes if too full ,you will have to hit it hard to get the stuff off the lock bars that keep them from moving .

Dec 17, 2008 | Sentry Fireproof Safe

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