How to Fix “RDK-03003 error code” in Xfinity?

Xfinity is a trading name of Comcast Cable Communications, the largest ISP in the United States. They have been in business for over 50 years and also own the second-largest cable network in the world. However, there have been numerous reports lately that users cannot watch TV with the Xfinity cable, and an “error code rdk-03003″ is displayed when they try.

How do I fix the "RDK-03003 error code" in Xfinity?

“Error code rdk-03003” on an Xfinity connection

This Xfinity bug prevents the user from entirely broadcasting cable television, and updating the decoder is not fruitful. Therefore, in this article, we will explain some of the reasons why this error can be raised and provide workable solutions to fix the problem.

What causes the “rdk-03003 error code” in Xfinity?

After receiving numerous reports from multiple users, we decided to investigate the problem and develop many solutions to resolve it fully. We also analyze the reasons for activation and list the most common:


The Internet router temporarily stores specific parameters and starts parameters with which a connection to the ISP server is then established. These settings can sometimes be corrupted and cause an unstable connection. The Internet must be connected to the Xfinity decoder for it to work correctly. An unstable connection can prevent this.

Bad Power Outlet:

In some cases, the outlet to which the signal amplifier was connected did not provide the high voltage required for proper operation, which caused the error.

Loose wire or cables:

An incorrectly connected cable can trigger this error.

After you have a basic idea of ​​the nature of the problem, let’s move on to the solutions. Make sure that you implement them in the order in which they appear to avoid conflicts.

How to Fix “RDK-03003 error code”

Simply carry out the following to fix the error code RDK-03003 on your Xfinity.

  • Reinitialize
  • Check the cables
  • Switch Power Outlet
  • Change source


Some start-up configurations can be damaged because the connection was not correctly made. Therefore, in this step, we restart the computer, including the router and switch it on completely. Therefore:

  • Disconnect your internet router and all wired devices from the power supply.

How do I fix the "RDK-03003 error code" in Xfinity?

  • Press and hold the “Power” button on your Internet router and cable box for 30 seconds.
  • Reconnect the power supply and wait for Internet services to start.

  • Check if the problem persists.

Check the cables

This error can occur due to loose cable connections to the socket or the decoder. In such situations, you may not be able to access the connection. So if you suspect such a case, you can disconnect all of the device’s cables and AC outlets, and then connect them properly.

But by connecting the connection; Make sure that you set the correct parameters. Now try to access the Xfinity server. If you can access the server, it means that you have configured the connection correctly. If not, you should try other solutions.

If a particular cable connected to the cable box is loose or badly connected, this can prevent the connection from being established and cause the error. It is therefore recommended to disconnect and reconnect all cables from the decoder. Then check if the problem persists.

Switch Power Outlet

If an electrical outlet does not supply enough voltage to the cable device, this can lead to the device not working correctly or even being switched on. It is therefore recommended to replace the connector for the signal amplifier and other cable devices. Check if the problem persists afterward.

Change source

The reduced power source can be a significant cause of this type of error. If the power outputs cannot provide sufficient power sources, switch the outputs of the signal amplifier and other devices to a single account to make a reliable connection.


There may be an Xfinity RDK 03003 error for various reasons. However, finding the exact cause can be a bit difficult. Here are some common causes that can lead to Comcast® RDK 03003:

If the device is underpowered and the AC outlets cannot supply enough power, the Xfinity Code RDK 03003 error may occur.

If the cables are not configured correctly and the socket is loose; This can lead to the Comcast RDK code 03003.

Some applications store the cache on the router, which enables the connection to be established. However, sometimes these cache files can also disconnect, resulting in the Comcast® RDK 03003 error.

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