How Do I Get Into Honeywell L5200 or L5210 Programming If I'm Locked Out?

You can get into Honeywell L5200 or L5210 programming if you're locked out by powering the system down and holding down the panel's home button while reapplying power. You will then perform a specific sequence of commands to get back into programming. This is is called the backdoor method.

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You should only perform the backdoor method for accessing programming if you are indeed locked out of programming. Both the L5200 and L5210 enter programming in the same manner. From the main screen of the L5200 or L5210, choose Security > More > Tools > Installer Code (default 4112) > Program. If you are taken to the System Programming screen, then you are not locked out of programming. Make sure to always choose "YES" when asked if you want to "allow the Installer to re-enter programming?" as you exit programming to prevent being locked out in the future. But if nothing happens when you click "Program", then you are locked out of programming, and you must use the backdoor method to get in.

The most common reason to become locked out of programming is because the option "NO" was chosen when asked if the Installer should be allowed to re-enter programming. Always choose "YES" at that screen to prevent being locked out. Another common reason to be locked out of programming is because you have lost the Installer Code. This issue can be prevented by keeping the system's Installer Code at its default of 4112. Remember that the Installer Code cannot disarm the system unless it was the code used to originally arm. Therefore, keeping the code at its default does not represent a security risk. You can learn more about keeping the IC at its default in this FAQ.

The backdoor method for entering programming is the same for both the Honeywell L5200 and the Honeywell L5210. Complete the following steps to backdoor into an L5200 or L5210:

1. Reboot the panel. The easiest way to reboot an L5200 or L5210 is to choose the option within the Master Tools Menu. From the main screen, select Security > More > Tools > Master Code (default 1234) > Test > Reboot > Yes. The system will begin its rebooting process.

However, it's possible that you might not know the Master Code for the system. If that's the case, then you must perform a hard reboot. Open up the panel, and unplug the backup battery from its port. This will cause a cover tamper condition. Press the touchscreen, or the Home Key beneath the touchscreen to silence the trouble beeping. Keep the panel open so that you can reconnect the backup battery later. You can complete the rest of this process with the panel still open.

Once the battery has been disconnected, unplug the panel's transformer from the wall outlet. The transformer should be secured to the outlet with a screw. If so, you will need a screwdriver to perform this step. This will power down the panel completely. Wait a few seconds, and plug the transformer back in to begin rebooting the system.

2. Begin the backdoor process. As soon as the panel lights up, press and hold down the Home button on the front of the panel, beneath the touchscreen. You will be required to hold down this button for several moments. Continue holding as the message "System Standby" appears. Once you see the top bar turn green with the message "Ready to Arm", or turn yellow with the message "Not Ready to Arm", then you can release the home button. This will begin the backdoor process.

3. Clear the lockout. After you release the home button, you must very quickly press "Security", followed by "Arm Stay". If the process was performed correctly, a numeric keypad will appear on the touchscreen. Once this happens, click "Clear", followed by "00". You will then enter the Installer Tools Menu. Then choose "Program" to enter the programming menu.

4. Don't get locked out! Now that you are in programming, you don't want to get locked out again. If necessary, change the Installer Code to the default of 4112 so that you can easily look up the code if you need to. Then use the return arrow in the upper-right corner to exit programming. When asked if the Installer should be allowed to re-enter programming, choose "YES". If you do not choose "YES", then you will become locked out of programming again, and you will need to perform the backdoor method again.

Also, if you had to perform a hard reboot, remember to reconnect the backup battery and close the panel once you have finished performing the backdoor method to access programming. Disarm the system twice to clear the cover tamper trouble. And remember to reapply the set screw for the transformer if you removed it earlier.

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Hi, Im glad you were successful with getting back. into your panel programming this was very informative.
This did not work for me. I found a video with a difference in when you hold the house icon. Don't hold the icon until the red line across the top. then the directions from the arm stay on work.
Hi, Any chance you have a programmed key fob you can use to disarm the system with? Alternatively, have you tried disarming with the default 1234 code? It sounds like you've been arming/disarming with something other than the panel's master code (probably the panel's installer code) and now that you've armed via Quick Arm, that code won't work (as the installer code won't disarm if a valid normal user code was used).
Surely theres another way! This just happened to me. I accidentally hit "quick arm" and now it won't let me use my code to disarm? I've been using it fine for a year until now...
Hi, the installer code will the stay the same if you do not know the installer code once you enter into programming you will be able to change it.
Hello, I am sure I locked myself out of Programing as I don't see the Program button. At first I tried the default installer code 4112 but it didn't work (I think it would just take me back to home screen). After a few attempts I tried my master code and that seemed to get me in the menu where I see test, events, schedules etc but no Program button. I will try these steps and reboot. But my question is, will the installer code go back to the default or will it be the one that was setup for me at initial setup which seems to be the same as my master code. I would like for my backlight to be off after inactivity. And can't get to it! BTW... your videos are very informative. :) Your help is greatly appreciated!
No, you will not.
if one performs these steps will you lose all your existing programming?
Are you able to post (or email to support@alarmgrid.com) a video of you trying the process so we can see what's happening?
Sorry and no words Thnks
There two a triangle and a house.
How many physical buttons below your touchscreen and do they have words AND symbols or just symbols?
The system is not armed, I have the system code and after rebooting going to arm stay and entering clear 00 and nothing happens.Thanks for your reply
If the system is armed, you won't be able to perform the back door method to get into programming. The system is always going to come up armed, rather than ready to arm, which won't allow you to perform the other steps required. You'd have to try to disarm (you can try all combinations of 4 digit codes from 0000 - 9999) or you'd have to replace the panel.
I have rebooted held home entered clear 00 at least 12 times, never leaves arm stay screen
You need to disarm the system first to use the back door programming method. If your system is armed and you don't know the code to disarm it, you will need to try every code (0000-9999) or get a new LYNX Touch panel and program your existing sensors to the new panel.
I was able to get into Tools before but not programming... however now even Tools is blocked.
I am not sure where I went wrong but after doing all of the steps it went into Arm Stay mode and has remained locked in that setting even after trying to repeat the steps again. Any suggestions?
Yes, you don't need to open the panel and disconnect battery and transformer as the panel offers a way to reboot through programming. Your sensor programming will never be lost during a power cycle or extended power outage.
Just so I understand...I can follow the steps beginning with #1 and then once rebooting begins I look for the white screen and hold the "HOME" button. Then follow the rest of the steps..I dont have to take the panel off? Next, Once the reboot is completed and the installer code is reset, do i need to enter/register the sensors again or will it retain its memory?
Hmm, I just tested an L5210 and pressed the home button as soon as I clicked Reboot and had no issues getting it to come up to Ready to Arm screen. We've also never had someone say it didn't work aside from you so perhaps you're doing a different process?
For newer devices (the 5210 at least), I've seen that you should wait until the "System Standby" screen appears before holding the Home key. If you hold the Home key while the white screen is displayed, it will never go to the Ready to Arm screen.

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