How to fix ADT system error code 103

If you are looking for information on how to fix the error code 103 on ADT systems, you arrived at the right place. Let's take a look at how to solve this issue.

The error code 103 usually shows up on the ADT Safewatch Pro 2000 and Pro 3000 series. With a little bit of patience, you can fix the problem yourself.

ADT Error code 103 check LngRng Radio

ADT 103 check lngrng radio message on the alarm panel

The previous picture shows an ADT panel with an error message.

Don't worry; there's a quick fix for that.

What causes the ADT error code 103

The message "103 check lngRng radio" indicates a problem with the system's communicator.  It's common to see such an error after some storm or surge.

Let's see how to fix this problem.

How to fix the ADT error code 103

If you are willing to try to solve the problem yourself, follow the steps below.

  • Put your system into test mode (Enter your master code and type 5);
  • Open the ADT keypad;
  • Disconnect the white cable from the circuit board for 30 seconds;
  • Connect the white cable back to the circuit board
  • Close the keypad;
  • Enter your master code into the keypad;
  • Press the "Off" button two times.

And it's done. The error code 103 should go away.

See the picture below.

ADT Error code 103 disconnect the white cable

Pull the cable, wait for 30s, and put it back.

The next step is to close the panel and press the OFF button twice.

The bottom line

You try to fix the ADT error code 103 yourself or call the ADT support team.

Sometimes this procedure can help you to save some money.

As you may know, ADT charges you to send a certified technician to your home.

And remember that you take the risk when dealing with electronic devices. This article can help you with the information. Still, I'm not responsible for any possible problems you can face with your ADT system.

I hope this article can help you; please share it with your friends.

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