TP-Link Deco Blinking Red light (Meanings & Fixes in 2024)

Are you experiencing your TP-Link Deco blinking red light? Don’t worry. A blinking red light on your TP-Link Deco indicates that the nodes have been disconnected from the main router.

Many users have reported a blinking red light on their TP-Link Deco, which can also be an indication of an issue with their network or device.

While it can be frustrating to troubleshoot these kinds of issues, it’s essential to address them promptly to ensure that you have a stable and reliable internet connection. One easy solution is rebooting or restarting your router. ‘

In this informative post, we’ll explore the reasons for a blinking red light on your TP-Link Deco and provide detailed steps to troubleshoot the issue.

We’ll also provide tips on maintaining a healthy and robust home network, so you can enjoy seamless connectivity and an excellent online experience.


Overview of TP-Link Deco LED Indicators

The LED lights on TP-Link Deco devices can provide valuable information about the status of your mesh network. Here’s a breakdown of what each type of blinking light means:

Slow Blinking Blue: This indicates that the Deco unit is ready to be added to a network. During setup, the Deco unit will pulse slowly blue.

Fast Blinking Blue: This means that the Deco unit is in the process of connecting to a network. Once it has successfully joined the network, the light will turn solid blue.

Solid Blue: This indicates that the Deco unit is connected to the network and is working correctly.

Solid Red: This means that the Deco unit has lost connection to the internet. This could be due to various reasons, such as a power outage or a problem with your internet service provider.

Slow Blinking Red: This indicates that the Deco unit is unable to connect to the main Deco unit. This could be due to a problem with the wireless connection between the Deco units.

Fast Blinking Red: This means that the Deco unit has encountered an error or is malfunctioning. This could be due to a firmware issue or a problem with the unit itself.

Solid Yellow: This means that the Deco unit is in the process of upgrading its firmware. This is a normal process and should not be a cause for concern.

Yellow Blinking: A yellow pulse indicates that the Deco unit is resetting itself to ensure everything is working correctly.

White Solid: A white solid light on your Deco unit indicates that it is registered and working correctly. This color is seen on some Deco models, such as Deco M4, Deco E4, and Deco W2400.

White Blinking: This means that the tp-link Deco device is upgrading its firmware. Updating the firmware helps improve performance and add new features.

Green Solid: A green solid light on some Deco models, such as Deco M5, Deco P7, and Deco M9 Plus, indicates that the Deco unit is registered and working correctly.

It’s important to keep in mind that these LED light patterns and colors may differ slightly depending on the specific model of your TP-Link Deco device. However, understanding what each type of blinking light means can help you troubleshoot issues with your mesh network and keep it running smoothly.


Why Is My TP-Link Deco Blinking Red Light?

There are the following reasons that can be responsible for the blinking red light on the Tp-link Deco mesh:

  • DNS request blocked
  • firmware corrupted
  • Faulty router
  • Technical/software glitch
  • Setting up a WPS connection
  • Connection lost
  • Connection is bad
  • Deco service is under maintenance


There are various ways to fix the TP-Link Deco blinking red light, and most of them a very easy to implement.

Follow the tried and tested fixes below, Your issue will be resolved.

Restart your Devices

Restarting all of your devices is often the easiest solution to fix the blinking red light on a TP-Link Deco. This is because the issue is usually caused by a random glitch with the software or hardware. A system restart refreshes the existing configurations and should eliminate the glitch.

To restart the TP-Link Deco Mesh network, you can follow these steps:

  • Load the Deco smartphone app.
  • Open the ‘Network’ tab.
  • All your Deco units should be listed here.
  • Click on the primary unit which you use as the router.
  • After selection, find the three-dots menu, click it, and select Reboot.
  • Now wait for the system to restart and see if the lights on your Deco devices stabilize.

If the issue persists, there are other solutions that you can try, such as moving the nodes closer to the main router or resetting the system to its factory settings.


Check the cables and connections

It’s always a good idea to review your cables and connections to ensure that your network is performing optimally. Damaged or loose cables can cause weak network connections between your router and satellites, which can result in your TP-Link Deco devices blinking red.

To prevent this from happening, it’s important to regularly inspect your cables and ensure that they’re in good condition. You should also check that the power supply is functioning properly.

To effectively inspect your cable connections, follow these steps:

  • Check that all cables are connected to the relevant ports correctly.
  • Be sure to plug the main Deco device into an electrical outlet and to get power to it.
  • Inspect the cable, splitter, power socket, and wall jack for any signs of moisture or damage.
  • Remove all cables and then reconnect them to ensure a snug fit.
  • Replace any damaged cables to ensure that your network is performing at its best.


Weak wireless connection

Signal loss or a weak wireless connection on your TP-Link Deco mesh network could be a reason for this.

  • Firstly, it could be because the Deco devices are too far apart from each other, causing the Wi-Fi signals to become weak.
  • Alternatively, obstacles such as walls or furniture could be blocking the signals.
  • Lastly, interference from other electronic devices in your home could disrupt the Wi-Fi signals.

To resolve this issue, try moving the Deco devices closer together, removing any obstacles that may be blocking the signals, and minimizing the use of other electronic devices when trying to use your Wi-Fi.


Power Cycle for the Devices

It’s an effective way to refresh the system and resolve any connectivity issues that may have arisen due to prolonged use. Power cycling involves unplugging all network devices from the power source and leaving them to rest for a few minutes before reconnecting them.

This can help clear any temporary glitches in the system and restore normal functionality. Follow these steps:

  • Turning off the Deco router using the on/off switch
  • Removing the power source plugs from the primary device and satellites
  • Waiting for up to five minutes before reconnecting the devices, are all crucial for a successful power cycle.
  • After the rest, the modem, router, and satellite devices should be reconnected and restarted, and the lights on the devices monitored.

This can help ensure that any blinking red lights indicating disconnection issues are resolved.


Main Deco router problem

It’s important to remember that the main Deco is like the brain of the system. It plays a crucial role in managing and controlling the Wi-Fi network in your home. However, sometimes the main Deco may encounter problems that can affect the overall performance of the network.

Two main types of problems can occur with the main Deco.

  • The first is power problems, which can happen if the device is not plugged into a working power outlet or if there is a power outage. In such cases, the main Deco won’t get enough power to function properly and this can impact the performance of the network.
  • The second type of problem is hardware problems, which may arise due to a defect in the device, or if it gets damaged.


Remove Obstacles

Obstacles in the way of the router can prevent network devices from passing through, leading to weak connectivity.

To resolve this issue, it’s important to remove any physical obstacles that are in the way of the router. You should also consider moving the router location if it’s in a location with poor air circulation, as this can impact the hardware performance. Here are the steps to follow to remove any physical obstacles:

  • Observe where your Deco router is located and see if any obstacles may be impacting the network connection.
  • If you identify an obstacle that can be moved, move it!
  • If the obstacle is too difficult to move, consider switching the location of the Deco device.
  • Find a place where the router is at a reasonable height, with no electronic appliance in its immediate vicinity.

By following these steps, you can remove any physical obstacles that may be affecting your Deco network’s performance and ensure that the router is in an optimal location for the best connectivity.


Network Outages issue

The blinking red light on your TP-Link Deco devices may be caused by issues with your internet service provider. In some cases, your ISP may be experiencing a network outage or doing maintenance work in your area, which can result in intermittent or inaccessible network connections and cause the blinking red light. To check for any network outages or maintenance work.

  • You can try using your phone network or another internet source to access your ISP’s website.
  • Look for any information on network outages or maintenance and follow the instructions provided.
  • If there is no information available, you can contact your ISP through email, chatbot, or phone call to inquire about the issue.
  • If there is an outage or maintenance, you may need to wait for the issue to be resolved by your ISP.

Update your Router’s Firmware

Outdated firmware is another possible reason why the TP-Link Deco devices may show a blinking red light, as it can cause conflicts with the wireless network. Apart from causing network issues, outdated firmware can also pose security risks, as it may contain malware that can compromise the router’s performance and users’ data.

To update the firmware on your TP-Link Deco, follow the steps below:

  • Open the Deco smartphone app and navigate to More > System > Update Deco.
  • If an update is available, download and install it on your device.

Alternatively, you can update the firmware using the web interface. Here are the steps to follow:

  • Go to the TP-Link download center on their website.
  • Select the correct model of your Deco device and the version of the hardware.
  • Look for the ‘firmware’ option and check if there is an update available for download.
  • Download and install the update if one is available for your device.

Make sure to follow the manufacturer’s instructions carefully and back up your settings before updating the firmware to avoid any potential issues.


Do a Factory Reset

It’s important to keep in mind that a factory reset will remove all previous settings and customizations, so it should only be done as a last resort.

However, if it’s necessary to perform a factory reset, I will follow the steps you provided,

  • Locating the reset button
  • Use a paper clip or pen to press it for 10 seconds
  • Waiting for around 10 minutes for the system to fully reset.


Contact Product Support

Contacting TP-Link’s support team is the last step. A web chat, phone call, or email can be used to reach the Product Support team.

The team will arrange for a replacement if your device is still under warranty and cannot be fixed. If there is no warranty, they will seek a repair.

Tips for Preventing TP-Link Deco Blinking Red Light

These are the tips for maintaining a healthy and robust home network, so you can enjoy seamless connectivity and an excellent online experience.

  • Change your Wi-Fi password regularly. This helps to prevent unauthorized access to your network and keeps your personal information safe. It’s recommended to change your password at least every six months and to use a strong and unique password that includes a mix of letters, numbers, and symbols.
  • Enable network encryption. Encryption is a security protocol that scrambles the data sent over your network so that it can only be deciphered by authorized devices. WPA2 is currently the most secure encryption standard for Wi-Fi networks, so be sure to enable it on your router if it’s available.
  • Disable remote management. Remote management allows you to access your router’s settings from a different location, but it also makes your network more vulnerable to attacks from hackers. It’s best to disable remote management unless you need it, and to only allow access from trusted IP addresses.
  • The router’s firmware is up to date. Firmware updates provide security patches and bug fixes that can address vulnerabilities in your router’s software. Check for updates regularly and install them as soon as they become available to ensure the security of your network.




In conclusion, a blinking red light on a TP-Link Deco device can be a cause for concern, as it indicates a disconnect between the main router and satellite devices. However, there are several strategies that you can employ to fix the issue, including restarting and power cycling the network, checking cable connections, updating firmware, implementing a factory reset, or contacting ISP customer support. By following these steps, you can quickly and effectively troubleshoot the problem and get your network back up and running.