How to change the codes on a Honeywell alarm system?

While changing the alarm codes can be different depending upon which Honeywell security system you are using, you can change the master code of most Honeywell alarm systems via the following method. Note that you must know the current master or installer code in order to change the master code, or any of the additional user codes.

Set a new master code: [Master Code] + [8] + [02] + [New 4-Digit Master Code] + [New Master Code again]

The default master code on most Honeywell security systems is “1234.” Once you have the master code set, you can add and delete additional user codes. The number of additional codes depends on the Honeywell security system.

Add a user code: [Master Code] + [8] + user # + [New user code]
Delete a user code: [Master Code] + [8] + user # + [#] [0]

If you want to change the master code and you do not currently know the master code, you can also use the installer code to set the master code.

Set a new master code: [Installer Code] + [8] + [02] + [New 4-Digit Master Code]

The default installer code on most Honeywell security systems is “4112.” If you do not know the installer code either, you must enter the system programming using the backdoor method (Holding down [*] & [#] during the first minute of power-up. Then, you can change the installer code in field *20.

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hi I got a Honewell WA12A.2.3 control box. I need to change my security code (forgot it) how do I go about it please?
Great, that is a VISTA-10PSIA system. If you follow the instructions for resetting the installer code (The last portion of the above FAQ), you should be able to access and change the installer code and then you can set up a new master code.
Okay I think I got it, the serial on the chip is WA10PSIA - 4.12.
That model number sounds like something you read off from the keypad. It's not an actual alarm control panel model number. Can you locate the beige metal alarm cabinet that houses the green circuit board and provide what's listed on the PROM chip in the middle of the green circuit board?
I recently moved into a new house and it has a Honeywell K4576V2-H M7458. The alarm code was not given me. Is there a way to factory reset?
What ECP address did you choose when programming the Tuxedo? Are you wiring the Tuxedo directly to your VISTA-21iP or are you using an auxiliary power supply?
Hi, i'm looking a solution about my tuxedo and vista panel 21 IP i've got ECP error what does it mean! and how can i fix it up? many thanks to answer that!
I would recommend the 6160 alphanumeric keypad (
If it helps, the reason you can't do this is because once you power up, you have 50 seconds to get to a working keypad and press the * + # to get into programming via the back door. The Tuxedo keypad takes too long to boot up to allow you to do this.
The simple answer is that you cannot access back door programming if you only have a Tuxedo. You need a console keypad to be able to press and hold * and # together upon power up.
Hello There, I have a simple question, How to perform a back door acces to the programming mode on a 21ip with tuxedo keyboard.
Hi Bernie, I'm not as familiar with that system as it's not usually sold in the States. Typically, you can change the installer code from the programming menu of the panel though. Once you know the installer, you can use that to program a new master code.
I have a VISTA 12A w/ Tuxedo WIFI Touch Keypad. How do you change the Installer & Master codes 4112 & 1234 respectively?
Thanks very much Julia, in this case, I have no other choose. Thanks again...:-)
Patrick, If you power down AC and battery, then have someone hold * + # DURING power up and this doesn't take you into programming, then it would seem the panel is locked out of local programming. If that's the case, you may have to replace the system, unless you can find who locked it out and have them unlock it. Usually this would be a previous alarm company.
Hello Alarmgrid expert, I recently move in a house and the house comes with vista 15p system with 6150 keypad. The previous owner didn't use the system for long time and don't remember the code for disarming the system. I have been trying to reset the system and hoping the system will reset back to its factory setting and I can follow the manual and reprogram it. However, I tried power down both the power supply and battery and power back up. It still power up with Armed stage and I can't do anything. I even tried have someone press * + # and hold them _while_ you restore AC power. Please help...
Which system do you have?
Is there a way to wipe all the codes since I am not sure I have each code from former employees (minus the master code)?
The default code is 4112. You would need a console keypad if 4112 doesn't work and you don't know what your current installer code is.
I have a VISTA-21iP w/ Tuxedo Touch Series Keypad. I do not know the installer code anymore. Is there a default code or can I reset and enter my own code?
Enter installer mode by pressing Installer Code + 800 and then press *41*, *43* and *99. That should solve your FC error. You can find the programming guide for your system at and the installation guide at
HI my alarm was monitored , now its not , how do I stop the FC error code ? is there an installer manual for this system ? thanks for the "backdoor" now I know my installer code ! ADEMCO VISTA 20P
I'm not sure exactly what you need? You program the phone number in field 43 and you have to make sure you have a phone line connected with live dial tone to the tip and ring terminals of the panel.
I am a newbie, I have a Vista-10p in the home I moved in with 6148 keypad and all 6 hardwired zones configured. I just found the installer code and also have the master code. If you can help me with adding new phone number and to check phone line connectivity. Appreciate your help. -Anilk
It depends on what system you have. Can you tell us the make and model number?
I just got a new house and there is a alarm inside but I don't know the code. is there a way to bypass and change the code
Yes, that would be a 6150RF keypad I would imagine. I'm glad to hear you got it working.
Never mind, I got it going again. Thank you very much for your response!
I pressed and held "1" and "3" and the display did come on (thank you!), but instead of a two digit number, "dE" flashed intermittently with "-". What should I do from here?
It sounds like your keypad is set to an address other than the default address of 16. It's common for an alarm installer to setup the customer keypads on addresses 17 or higher so that they can come in and use their alphanumeric programming keypads on address 16 without worrying about address conflicts. If you press and hold 1 and 3 on the keypad with no display, it will display the address and I'm willing to be you'll find it's set to an address above 16. Once you know what address it's set to, you simply have to re-enable that address in panel programming using fields *190 and above or set the existing keypad to address 16.
In programming mode, I hit *97 to reset fields to defaults, but when I did the display continued to show "97" and I could not get back out. So I followed the backdoor method to restart the system, which I had successfully done earlier. When powering the system back on, the LEDs on the keypad came on, but I have had nothing come up on my display. Can you give me some direction here? Thanks!
I'm glad I was able to help!
I finally figure out what you mean by "to have your zones enable" I get it working now. Thank you very much
There are many options that could prevent the reporting. If you are monitored, I would suggest you have your alarm company check all the settings to see what's wrong.
I'm just an end user. Can you tell me what other fields that required for reporting and which program menu mode should I use?
There are other fields required for reporting. You would have to have your zones enabled with report codes to start. Are you an alarm installer or an end user?
yes, I use *48 as well as *49 to enable report format and reporting, do I program it correctly ?
Do you have report codes enabled?
the control panel(Honeywell vista 20p) is not making call to the central station when alarm goes off. The account and phone # are program to panel correctly and I get the dial tone by hooking up the phone to terminal 23& 24 please me to resolve this problem issue. Thanks
I'm glad it finally worked! Sorry the instructions weren't more clear originally. Let us know if you need anything else.
So, if thought I knew what I'm doing, I'd feel dumb. But I just feel grateful that you held my hand through that, it worked perfectly. Thank you.
Okay, so when you enter programming and see the 20, are you pressing *20 and then the four digit code?
I just did that, and no difference. One thing I forgot to mention, after keying in the 4 digits, the 20 starts to slowly flash on and off.
Have you tried a different 4 digit code?
Ademco Vista-20se
What is the exact model number of the panel you have?
Yes, I used the backdoor, and it is displaying a 20 on the keypad. I have tried several times to enter the 4 digits, each digit beeps as I enter it, but after all 4 are entered, there is no beep. It is not the same as the Master code, and I have no idea if the original installer entered sub user codes or not.
If you press the * key on the keypad, what does the keypad display?
Did you already enter programming? If not, a 20 could just mean zone 20 is faulted. Otherwise, if you are in programming, you should be able to enter the new 4 digit installer and it will beep and advance to the next field. Make sure not to be using a 4 digit code that is already being used as the Master code or one of the sub user codes.
I have 20 showing on the panel. I used the backdoor, as my system was monitored and serviced years ago, and they obviously changed the Installer Code. I am now trying to change it to a new 4 digit code. At the 20 I am typing in the new 4 digits, but the panel doesn't beep, and the change isn't happening. What could be going wrong?
My alarm is beeping randomly and it is telling me the system is not ready. I have checked all doors and windows and they are all shut.
Simply type in a new four digit code and the panel should beep and proceed to the next programming field. If that is the only change you are making, press *99 to exit programming. If done properly your new code + 800 will get you into programming going forward.
I have the "Installer Code 20" showing now. How do I enter my new code?
'Installer Code 20' or '20' will show up on the screen when you use the back door programming trick if you have done it properly. The programming of the panel is broken out into "fields" which are just different sections of programming. The installer code is in field 20.
does "field *20" appear when you backdoor? I am unsure where these "fields" are.
oh really. I thought the Lynx could only handle 6... OK...and thanks for the info... I think we are switching to the Vista15P pretty soon. That is good to know. Thanks for the reply.
The amount of user codes available is dependent on the control panel, not the keypad. If you have a VISTA-20P, you can do up to 48 system user codes. A VISTA-15P only supports 32. Also, the LYNX Touch will allow up to 16 codes (Installer, Master, Babysitter, Duress and 12 additional sub users).
How many sub user codes can you program a honeywell 6150 keypad ? 6150RF ? I know that the Honeywell Lynx it will only handle 6. I have a customer who needs 16 sub user codes. I know there are some high dollar touchpads that can handle that amount but I think the 6150 series allows up to 20 I think... I could be wrong. Ive been on hold with tech support going on 34 min. now. Thanks for any feedback.
You should call us when you are home with the system so we can assist you.
What do you mean by "you can change the installer code in field *20. Also what is a "lead" from the battery"? I have the same problem that I moved in and they didnt give me the installer code or the mastercode. I have no idea where to start.
The last paragraph of this FAQ shows you how to access your panel's programming and change the installer code. Once you have changed the installer code, you have the code needed to change the master code.
what about if i donot know the mastercode , i just moved to a new house and i donot know thw master code
No, it will not reset any of the programming.
Thanks. Will this method reset all the programmed settings?? if so, what happens if I try to find the code by entering several 4-digit codes?? thanks.
Yes, you will need to open the alarm cabinet. Most systems don't have a tamper switch on the panel but if yours does, it may just beep at the keypad.
Hello, do I need to open the panel to be able to remove one lead from the battery?? will something happen if I open the panel?? something like triggering an alarm or sound?? thanks.
Remove one lead from the battery and then unplug the transformer (power adapter) that is plugged into the wall outlet. You may have to search the house a bit to find the transformer if it isn't plugged in as the same room as your system.
Hello thank for this "backdoor", but can you tell me how power off? I have a battery.

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