We moved into a house with a small Simplex safe in the wall but don't know the combination. How can we unlock it?

It is good that you have the keys. Google search your manufacturer make and model and the word manual. If one is available, you can find it in the search results.

"If your lock is opening on every turn of the knob or lever, except upon entering a code, this may be a ZERO CODE. Before attempting to remove the lock from the door, refer to the troubleshooting procedures outlined at bottom of this document for a zero code symptom/solution

Solution: Follow the procedure for changing a combination except omit step 3 (do not enter
the existing combination)."

I excerpted the above from the full instructions on how to change the code. If you don't have them, got to this link:

http://www.kaba-ilco.com/access_control/literature/literature_grid_mechanical_pushbutton_locks.aspx?id=13

and go across from L1000 to the last column, "Tips".
When you hover your mouse over PDF, two choices will appear; left click on the upper one, "Changing the code/..." to download it.
The download will be a PDF file format. If you are unable to open it, you will need to download and install Adobe Reader on your computer. There is a link (Get Adobe Reader) at the top right of the literature grid.
When you do get the download open, you will have the stepwise procedure and illustrations necessary-but don't forget to omit Step 3, if you believe that you have the ZERO code problem!

Good luck--and please provide feedback if this helps!

I found this instruction elsewhere on this site ( thanks to pctuneup191):
pctuneup191


PROCEDURES TO CHANGE THE COMBINATION OF SIMPLEX 1000 SERIES CIPHER LOCKS


1.) ENSURE THE DOOR IS OPEN.


2.) INSERT THE DF-59 CONTROL KEY INTO THE COMBINATION CHANGE PLUG ASSEMBLY (ON THE BACK OF THE DOOR) AND UNSCREW THE CYLINDER BY TURNING THE KEY COUNTERCLOCKWISE.


3.) TAKE THE CHANGE PLUG ASSEMBLY COMPLETELY OUT OF THE DOOR.


4.) TURN THE OUTSIDE DOOR KNOB CLOCKWISE ALL THE WAY UNTIL IT STOPS, THEN RELEASE THE KNOB.


5.) PRESS IN THE EXISTING COMBINATION FIRMLY.


6.) INSERT THE SPANNER WRENCH IN THE COMBINATION CHANGE SLEEVE. IT SHOULD INSERT AT THE NINE O'CLOCK POSITION.


7.) TURN THE SPANNER WRENCH GENTLY CLOCKWISE UNTIL IT STOPS AT THE 12 O'CLOCK POSITION. NOTE THE NOTCHES IN THE COMBINATION CHANGE SLEEVE MOVES AS THE SLEEVE IS MOVED.


8.) TURN THE SPANNER WRENCH COUNTERCLOCKWISE BACK TO THE NINE O'CLOCK POSITION UNTIL IT STOPS. REMOVE THE SPANNER WRENCH.


9.) TURN THE OUTSIDE DOOR KNOB CLOCKWISE (ALL THE WAY, UNTIL IT STOPS), THEN RELEASE.


10.) INSERT THE NEW COMBINATION BY PRESSING IN THE BUTTONS. USE AT LEAST three numbers and a maximum of five.


11.) TURN THE DOOR KNOB CLOCKWISE ONCE, ALL THE WAY, UNTIL IT STOPS. HOLD IN THIS POSITION AND CHECK IF THE LATCH IS RETRACTED.


12.) RELEASE THE DOOR KNOB.


13.) TURN THE DOOR KNOB CLOCKWISE ONE MORE TIME TO THE STOP POSITION. AT THIS POINT, THE LATCH SHOULD NOT RETRACT UNLESS YOU USE THE NEW COMBINATION.


14.) REINSERT THE CYLINDER INTO THE BACK OF THE DOOR BY SCREWING IT IN CLOCKWISE WITH THE DF-59 CONTROL KEY (DO NOT OVERTIGHTEN!)


REMOVE THE KEY.

A Df-59 key can be purchased at this site:

http://absupply.net/kaba-access-control-lock-1000-series-key-df59.aspx

Good Luck!

I believe you can find this to be relevant:
I found this instruction elsewhere on this site ( thanks to pctuneup191):

PROCEDURES TO CHANGE THE COMBINATION OF

SIMPLEX 1000 SERIES CIPHER LOCKS


1.) ENSURE THE DOOR IS OPEN.


2.) INSERT THE DF-59 CONTROL KEY INTO THE COMBINATION CHANGE PLUG ASSEMBLY (ON THE BACK OF THE DOOR) AND UNSCREW THE CYLINDER BY TURNING THE KEY COUNTERCLOCKWISE.


3.) TAKE THE CHANGE PLUG ASSEMBLY COMPLETELY OUT OF THE DOOR.


4.) TURN THE OUTSIDE DOOR KNOB CLOCKWISE ALL THE WAY UNTIL IT STOPS, THEN RELEASE THE KNOB.


5.) PRESS IN THE EXISTING COMBINATION FIRMLY.


6.) INSERT THE SPANNER WRENCH IN THE COMBINATION CHANGE SLEEVE. IT SHOULD INSERT AT THE NINE O'CLOCK POSITION.


7.) TURN THE SPANNER WRENCH GENTLY CLOCKWISE UNTIL IT STOPS AT THE 12 O'CLOCK POSITION. NOTE THE NOTCHES IN THE COMBINATION CHANGE SLEEVE MOVES AS THE SLEEVE IS MOVED.


8.) TURN THE SPANNER WRENCH COUNTERCLOCKWISE BACK TO THE NINE O'CLOCK POSITION UNTIL IT STOPS. REMOVE THE SPANNER WRENCH.


9.) TURN THE OUTSIDE DOOR KNOB CLOCKWISE (ALL THE WAY, UNTIL IT STOPS), THEN RELEASE.


10.) INSERT THE NEW COMBINATION BY PRESSING IN THE BUTTONS. USE AT LEAST three numbers and a maximum of five.


11.) TURN THE DOOR KNOB CLOCKWISE ONCE, ALL THE WAY, UNTIL IT STOPS. HOLD IN THIS POSITION AND CHECK IF THE LATCH IS RETRACTED.


12.) RELEASE THE DOOR KNOB.


13.) TURN THE DOOR KNOB CLOCKWISE ONE MORE TIME TO THE STOP POSITION. AT THIS POINT, THE LATCH SHOULD NOT RETRACT UNLESS YOU USE THE NEW COMBINATION.


14.) REINSERT THE CYLINDER INTO THE BACK OF THE DOOR BY SCREWING IT IN CLOCKWISE WITH THE DF-59 CONTROL KEY (DO NOT OVERTIGHTEN!)


REMOVE THE KEY.

A Df-59 key can be purchased at this site:

http://absupply.net/kaba-access-control-lock-1000-series-key-df59.aspx

The spanner wrench (SMPBC201278 Simplex:SpannerWrench $9.00) referred to can be purchased from this site:
http://www.ckilock.com/Mpage18.asp

Here is the "literature grid" from the KABA website, which has manuals and parts lists for the Simplex mechanical pushbutton locks:
http://www.kaba-ilco.com/access_control/literature/literature_grid_mechanical_pushbutton_locks.aspx?id=13

Here's the website to continue your search:
http://www.kaba-ilco.com/access_control/products/eplex.aspx?id=6

Good luck!

Good Luck!

I found this instruction elsewhere on this site ( thanks to pctuneup191):

PROCEDURES TO CHANGE THE COMBINATION OF

SIMPLEX 1000 SERIES CIPHER LOCKS


1.) ENSURE THE DOOR IS OPEN.


2.) INSERT THE DF-59 CONTROL KEY INTO THE COMBINATION CHANGE PLUG ASSEMBLY (ON THE BACK OF THE

DOOR) AND UNSCREW THE CYLINDER BY TURNING THE KEY COUNTERCLOCKWISE.


3.) TAKE THE CHANGE PLUG ASSEMBLY COMPLETELY OUT OF THE DOOR.


4.) TURN THE OUTSIDE DOOR KNOB CLOCKWISE ALL THE WAY UNTIL IT STOPS, THEN RELEASE THE KNOB.


5.) PRESS IN THE EXISTING COMBINATION FIRMLY.


6.) INSERT THE SPANNER WRENCH IN THE COMBINATION CHANGE SLEEVE. IT SHOULD INSERT AT THE NINE

O'CLOCK POSITION.


7.) TURN THE SPANNER WRENCH GENTLY CLOCKWISE UNTIL IT STOPS AT THE 12 O'CLOCK POSITION. NOTE

THE NOTCHES IN THE COMBINATION CHANGE SLEEVE MOVES AS THE SLEEVE IS MOVED.


8.) TURN THE SPANNER WRENCH COUNTERCLOCKWISE BACK TO THE NINE O'CLOCK POSITION UNTIL IT STOPS.

REMOVE THE SPANNER WRENCH.


9.) TURN THE OUTSIDE DOOR KNOB CLOCKWISE (ALL THE WAY, UNTIL IT STOPS), THEN RELEASE.


10.) INSERT THE NEW COMBINATION BY PRESSING IN THE BUTTONS. USE AT LEAST three numbers and a

maximum of five.


11.) TURN THE DOOR KNOB CLOCKWISE ONCE, ALL THE WAY, UNTIL IT STOPS. HOLD IN THIS POSITION AND

CHECK IF THE LATCH IS RETRACTED.


12.) RELEASE THE DOOR KNOB.


13.) TURN THE DOOR KNOB CLOCKWISE ONE MORE TIME TO THE STOP POSITION. AT THIS POINT, THE LATCH

SHOULD NOT RETRACT UNLESS YOU USE THE NEW COMBINATION.


14.) REINSERT THE CYLINDER INTO THE BACK OF THE DOOR BY SCREWING IT IN CLOCKWISE WITH THE DF-59

CONTROL KEY (DO NOT OVERTIGHTEN!)


REMOVE THE KEY.

A Df-59 key can be purchased at this site:

http://absupply.net/kaba-access-control-lock-1000-series-key-df59.aspx

The spanner wrench (SMPBC201278 Simplex:SpannerWrench $9.00) referred to can be purchased from

this site:
http://www.ckilock.com/Mpage18.asp

Here is the "literature grid" from the KABA website, which has manuals and parts lists for the
Simplex mechanical pushbutton locks:

http://www.kaba-ilco.com/access_control/literature/literature_grid_mechanical_pushbutton_locks.
aspx?id=13

Good Luck!

I found this instruction elsewhere on this site ( thanks to pctuneup191):

PROCEDURES TO CHANGE THE COMBINATION OF

SIMPLEX 1000 SERIES CIPHER LOCKS


1.) ENSURE THE DOOR IS OPEN.


2.) INSERT THE DF-59 CONTROL KEY INTO THE COMBINATION CHANGE PLUG ASSEMBLY (ON THE BACK OF THE

DOOR) AND UNSCREW THE CYLINDER BY TURNING THE KEY COUNTERCLOCKWISE.


3.) TAKE THE CHANGE PLUG ASSEMBLY COMPLETELY OUT OF THE DOOR.


4.) TURN THE OUTSIDE DOOR KNOB CLOCKWISE ALL THE WAY UNTIL IT STOPS, THEN RELEASE THE KNOB.


5.) PRESS IN THE EXISTING COMBINATION FIRMLY.


6.) INSERT THE SPANNER WRENCH IN THE COMBINATION CHANGE SLEEVE. IT SHOULD INSERT AT THE NINE

O'CLOCK POSITION.


7.) TURN THE SPANNER WRENCH GENTLY CLOCKWISE UNTIL IT STOPS AT THE 12 O'CLOCK POSITION. NOTE

THE NOTCHES IN THE COMBINATION CHANGE SLEEVE MOVES AS THE SLEEVE IS MOVED.


8.) TURN THE SPANNER WRENCH COUNTERCLOCKWISE BACK TO THE NINE O'CLOCK POSITION UNTIL IT STOPS.

REMOVE THE SPANNER WRENCH.


9.) TURN THE OUTSIDE DOOR KNOB CLOCKWISE (ALL THE WAY, UNTIL IT STOPS), THEN RELEASE.


10.) INSERT THE NEW COMBINATION BY PRESSING IN THE BUTTONS. USE AT LEAST three numbers and a

maximum of five.


11.) TURN THE DOOR KNOB CLOCKWISE ONCE, ALL THE WAY, UNTIL IT STOPS. HOLD IN THIS POSITION AND

CHECK IF THE LATCH IS RETRACTED.


12.) RELEASE THE DOOR KNOB.


13.) TURN THE DOOR KNOB CLOCKWISE ONE MORE TIME TO THE STOP POSITION. AT THIS POINT, THE LATCH

SHOULD NOT RETRACT UNLESS YOU USE THE NEW COMBINATION.


14.) REINSERT THE CYLINDER INTO THE BACK OF THE DOOR BY SCREWING IT IN CLOCKWISE WITH THE DF-59

CONTROL KEY (DO NOT OVERTIGHTEN!)


REMOVE THE KEY.

A Df-59 key can be purchased at this site:

http://absupply.net/kaba-access-control-lock-1000-series-key-df59.aspx

The spanner wrench (SMPBC201278 Simplex:SpannerWrench $9.00) referred to can be purchased from this site:
http://www.ckilock.com/Mpage18.asp

Here is the "literature grid" from the KABA website, which has manuals and parts lists for the
Simplex mechanical pushbutton locks:
http://www.kaba-ilco.com/access_control/literature/literature_grid_mechanical_pushbutton_locks.
aspx?id=13

Customer service can be contacted from this link:

http://www.kaba-ilco.com/access_control/support_contacts/service_and_support.aspx

Good Luck!

This is the sequence that I came up with.
Good or bad,please rate my post?
Thanks
Bob

Resetting the Code/Combination From a Lost Code
Simplex LP1000
Important: There is no procedure for finding an unknown combination from the front of the lock. A lost combination must be cleared by removing the combination chamber from the lock housing, then a new combination can be set.
LP1000 Series FAQ
Resetting the Code/Combination From a Lost Code
1. Remove the back plate from the front lock housing by removing the six back plate screws.
2. Remove the two Phillips head screws (F) securing the guide bracket (D
to the front housing. Grasp the guide bracket and slide it back to
disengage it from the clutch linkage (see figure 1).
3. Lift the two chamber links (A) off of the control shaft (B) using a small flat blade screwdriver. Mark links to assure proper reassembly (see figure 1).
4. Remove the combination chamber (E) by removing the Phillips head screws (G) at each end of the chamber (see figure 1).
5. Remove shaft bushing (C) from control shaft (see figure 1).
6. Remove chamber cover marked ILCO UNICAN (A) (see figure 2) by gently tapping the lip of the chamber cover (A) at the control shaft end of the
chamber (see figure 3) with a screwdriver to detach it from the staked joints (B).
7. Lay the chamber on its side as shown in figure 4.
8. With tweezers, or other tool, slide the "E" ring (B) off the unlocking slide
stud (A) (see figure 17-4), then gently lift the end of the unlocking slide (C) over the unlocking slide stud (A) (see figure 5).
Note: The unlocking slide (C) is under spring tension and will be easier to lift if pushed to the left to ease tension. Swing the unlocking slide (C) sufficiently to clear the gears, (D) no further than shown in figure 5.
9. Depress the lockout slide (E) as shown in figure 6. The gears (D) are now free to rotate.
10. Turn each gear (D) so that the slots (F) are aligned as shown in figure 6.
11. Return the unlocking slide (C) over the unlocking slide studs (A) while making certain the five toes (G) are engaged in the five gear pockets (F). It may be necessary to adjust each gear (D) slightly to make proper alignment between toes and gear slots (see figures 6 & 7).
Re-secure the "E" ring on the stud (A). Your chamber will now resemble figure 7 and is ready for reassembly with the lock housing.
REASSEMBLY
1. Re-secure the chamber cover (A) marked ILCO UNICAN. Make sure the staked joints (B) (see figure 2) on both end plates fit through both slots on the chamber cover.
2. Re-secure the shaft bushing (C) with flat side facing up (see figure 8).
3. Secure the combination chamber with the two Phillips head screws (G) you removed earlier.
4. Re-secure the chamber links (A) onto the control shaft.
5. Replace the guide bracket (D) by aligning the clutch linkage in the guide bracket and secure with the two Phillips head screws (F) previously removed.
6. Replace the back plate and secure it with the six back plate screws.
SETTING THE COMBINATION
Do not attempt to set a combination until the complete unit has been reassembled.
Perform the following steps in the order shown.
1. Turn the outside lever once to the stop position and then release.
2. Enter the new combination.
3. Turn the outside lever to the stop position, make sure the latch is fully retracted, then release
the lever.

Your screwed.

goto SentySafe.com
https://www.sentrysafe.com/customerCare/retrieveCombination.aspx
register and request the combination base on the serial number.
they should be able to send you the combination keys

u can request a lost combo from the sentrysafe.com u gotta get a it noteiatized and send it in to them the details are listed on the webpage i hope this helps u