Roomba error 8 – How to fix

Navigating the world of home automation can be a thrilling journey, especially when it comes to the convenience of robotic vacuum cleaners like Roomba. However, encountering an error message, such as the dreaded Roomba Error 8, can quickly turn convenience into frustration. This comprehensive guide aims to demystify Roomba Error 8, providing detailed insights into its causes and step-by-step solutions to ensure your robotic helper is back in action swiftly.

Roomba error 8

Roomba Error 8: Unraveling the Causes Behind the Common Issue

When your Roomba displays Error 8, it’s signaling a problem directly related to its power source – the battery. This error is not just a minor hiccup; it’s an indication of underlying issues that need immediate attention to ensure your robotic vacuum continues to operate efficiently. Let’s delve into the reasons behind this error:

  1. Dirty Charging Contacts: Over time, your Roomba’s charging contacts can accumulate dust and debris. This build-up can interfere with the charging process, leading to Error 8. Regular cleaning is essential to maintain a good connection between the charging station and your Roomba.
  2. Battery Connection Issues: Sometimes, the battery may not be correctly seated in its compartment. This improper connection can cause the Roomba to display Error 8, as the device cannot recognize the power source.
  3. Battery Degradation: Rechargeable batteries have a limited lifespan. Over time, they lose their ability to hold a charge effectively. If your Roomba’s battery has degraded significantly, it can lead to this error.
  4. Faulty Charging Station: In some cases, the problem might not be with the Roomba itself but with the charging station. A malfunctioning or damaged charging dock can prevent your Roomba from charging correctly, resulting in Error 8.
  5. Software Glitches: Like any smart device, Roombas rely on firmware to operate. Occasionally, software glitches can cause various errors, including Error 8. These can often be resolved with a simple reset or firmware update.
  6. Ambient Temperature Issues: Roombas are designed to operate within certain temperature ranges. If the device is in an environment that’s too hot or too cold, it might have trouble charging, which can trigger this error message.
  7. Electrical Problems: Issues with your home’s electrical supply can also affect the Roomba’s charging process. Fluctuations in power or inadequate supply can prevent the Roomba from charging properly, leading to Error 8.

Understanding these causes is the first step towards troubleshooting and resolving Roomba Error 8. Regular maintenance, proper handling, and timely interventions can significantly reduce the chances of encountering this issue, ensuring your Roomba remains a reliable cleaning companion.

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How to Fix Roomba error 8?

Fix 1: Thoroughly Cleaning the Charging Contacts

When addressing the Roomba Error 8, a critical step is to clean the charging contacts thoroughly. This procedure is not just about wiping away the dust; it involves a meticulous cleaning process to ensure that the connection between the Roomba and its charging station is optimal. Over time, charging contacts on both the Roomba and the charging dock can accumulate debris and dust, which can interfere with the charging process, leading to Error 8. Here’s how you can effectively clean these contacts:

  • Gather Necessary Materials: Before you begin, ensure you have everything needed for the cleaning process. You’ll require a clean, dry cloth, perhaps a cotton swab, and rubbing alcohol. These items are commonly found in most households and are safe to use on electronic devices.
  • Power Down Your Roomba: Safety first. Turn off your Roomba to prevent any electrical issues or accidental activation during cleaning. Remove it from the charging dock if it’s placed there.
  • Locate the Charging Contacts: On your Roomba, you will find the charging contacts typically located on the underside of the robot. They are metal plates or strips that align with the contacts on the charging dock.
  • Clean the Robot’s Contacts: Take your dry cloth and gently wipe the contacts on your Roomba. If there’s stubborn grime, dampen a corner of the cloth with a small amount of rubbing alcohol and gently rub the contacts. Be cautious not to use too much liquid. For hard-to-reach areas, use a cotton swab.
  • Clean the Dock’s Contacts: Similarly, clean the contacts on the charging dock. These contacts are usually protruding pins or plates. Gently wipe them with the dry cloth, and use the alcohol-dampened cloth for tougher dirt. Again, ensure the cloth isn’t too wet.
  • Dry the Contacts: After cleaning, make sure that all contacts are completely dry before you attempt to charge the Roomba again. Any residual moisture can cause electrical issues.
  • Reassemble and Test: Once everything is dry, place your Roomba back on its charging dock. Turn it on and check if the Error 8 has been resolved. In many cases, this simple cleaning process effectively eliminates the problem.
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This step is fundamental in maintaining your Roomba and should be done regularly, even when there are no error messages. Keeping the charging contacts clean ensures efficient charging and prolongs the life of your robotic vacuum cleaner.

Fix 2: Ensuring Proper Battery Connection

Another crucial step in resolving the Roomba Error 8 is to check and secure the battery connection. Sometimes, the issue is not with the battery itself, but with how it is connected to the Roomba. A loose or improperly seated battery can disrupt the power flow, causing the Roomba to display Error 8. Here’s a detailed process to ensure that the battery connection is secure and correct:

  • Power Off Your Roomba: Before you begin any work on the battery, it’s important to turn off your Roomba. This is a safety measure to prevent any electrical mishaps and to ensure that you can work on the battery without any interruptions.
  • Access the Battery Compartment: The battery compartment in a Roomba is usually located on the underside of the robot. You will likely need a screwdriver to open this compartment. Once you have the appropriate tool, carefully remove the cover to access the battery.
  • Inspect the Battery: Take a moment to visually inspect the battery. You’re looking for any signs of damage, corrosion, or wear and tear. If the battery appears damaged, it may need to be replaced. However, if it looks in good condition, proceed to the next step.
  • Remove and Reinstall the Battery: Gently take the battery out of its compartment. This action allows you to check if there’s any debris or obstruction in the battery bay that might be affecting the connection. Once you’ve ensured the bay is clean, carefully reinstall the battery, making sure it’s properly seated and the connections are aligned correctly.
  • Ensure a Secure Connection: After reinstalling the battery, it’s important to check that the connections are secure. The battery should fit snugly in its compartment with no loose parts. This secure fit ensures a stable and consistent power supply to the Roomba.
  • Close the Battery Compartment: Once you’re satisfied that the battery is properly installed, replace the cover of the battery compartment. Make sure all screws are tightened appropriately, so the cover is securely fastened.
  • Test Your Roomba: After reassembling your Roomba, turn it on and place it on the charging dock. Observe if the Error 8 has been resolved. A properly connected battery should allow your Roomba to charge without any issues.

This step is not just a fix for the present error but also a preventive measure for future power-related problems. Regularly checking the battery connection can save you from various potential issues and ensure your Roomba operates efficiently.

Fix 3: Resetting the Roomba

Resetting your Roomba is a powerful step in troubleshooting the Error 8 issue. This action can resolve underlying software glitches or system errors that might be causing the battery charging problem. A reset is often akin to giving your Roomba a fresh start, clearing any temporary software issues that could be interfering with its normal operation. Here’s how to reset your Roomba effectively:

  • Start with the Roomba Charged: Ensure your Roomba has some charge before initiating a reset. If it’s completely drained, try charging it for a bit, even if you’re facing the Error 8 issue.
  • Locate the Reset Button or Procedure: Depending on your Roomba model, the reset procedure can vary. Some models have a dedicated reset button, while others require a specific combination of buttons to be pressed. Refer to your Roomba’s manual for the exact reset method for your model.
  • Perform the Reset: If your Roomba has a reset button, press and hold it for a few seconds until the device begins the reset process. If your model requires a button combination, usually involving the ‘Clean’ button and other specific keys, press and hold these as instructed in the manual. The Roomba may shut down and restart as part of the reset process.
  • Wait for the Roomba to Reboot: After initiating the reset, give your Roomba some time to reboot. This process can take a few minutes. The Roomba may go through a series of checks and diagnostics as it restarts.
  • Check for Error 8 Resolution: Once your Roomba has restarted, observe if the Error 8 is still being displayed. A successful reset should resolve any software-related issues causing the error.
  • Regular Firmware Updates: Post-reset, ensure your Roomba is updated with the latest firmware. These updates often contain fixes for known bugs and can improve the overall performance of your Roomba.
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Resetting your Roomba not only addresses the immediate Error 8 issue but also helps in maintaining the long-term health of your device. It’s a simple yet effective solution that should be part of your regular Roomba maintenance routine.

Fix 4: Managing Ambient Temperature for Optimal Charging

Ambient temperature plays a significant role in the performance and charging capability of your Roomba. If the Roomba is located in an environment that’s too hot or too cold, it can trigger Error 8 due to charging difficulties. Ensuring the device operates within the recommended temperature range is crucial for its longevity and efficiency.

  • Identify the Ideal Operating Temperature: Refer to your Roomba’s user manual to find the optimal temperature range for operation and charging. Most Roombas are designed to function best in typical room temperatures.
  • Adjust the Room Temperature: If the area where you use or charge your Roomba is outside the recommended temperature range, make adjustments. This might mean moving the charging station away from sources of heat like radiators, or cold like air conditioners or drafty windows.
  • Avoid Direct Sunlight: Placing your Roomba or its charging station in direct sunlight can lead to overheating, which in turn could cause charging issues. Find a location that is away from direct sunlight but still accessible for your Roomba.
  • Monitor for Changes: After making these adjustments, monitor your Roomba to see if the Error 8 persists. A stable and suitable ambient temperature can significantly improve charging efficiency and reduce the likelihood of this error.

Fix 5: Inspecting and Replacing the Battery if Necessary

If the above solutions don’t resolve the Error 8, it might be time to consider that the battery itself is the issue. Roomba batteries, like all rechargeable batteries, have a limited lifespan and eventually need replacement.

  • Inspect the Battery: Remove the battery from your Roomba and inspect it for any signs of swelling, leakage, or damage. These are clear indicators that the battery needs to be replaced.
  • Check Battery Performance: Consider the age of your Roomba and how frequently it’s used. Batteries typically last for a certain number of charge cycles, and an older Roomba might simply need a new battery due to normal wear and tear.
  • Purchase a Replacement Battery: If you’ve determined that the battery is the issue, purchase a replacement. It’s important to buy a battery that is compatible with your specific Roomba model. Using an incompatible or low-quality battery can lead to further issues.
  • Install the New Battery: Follow the instructions provided with the replacement battery to install it correctly. Ensure that it’s securely connected and properly seated in the battery compartment.
  • Test Your Roomba: After installing the new battery, charge your Roomba and check if the Error 8 has been resolved. A new, functional battery should eliminate any charging-related errors.

Addressing Roomba Error 8 effectively requires a methodical approach. By systematically going through these fixes, you can identify and resolve the underlying cause, ensuring that your Roomba returns to its efficient, helpful self. Regular maintenance and prompt attention to errors like these can significantly extend the life and performance of your robotic vacuum.

Fix 6: Ensuring a Stable Power Supply

An unstable or inadequate power supply can be a less obvious yet significant cause of Roomba Error 8. Ensuring that your Roomba receives a consistent and sufficient power supply from the outlet can be crucial in resolving this error.

  • Check the Power Outlet: Start by ensuring the power outlet used for the Roomba’s charging dock is functioning correctly. You can test the outlet by plugging in another device to see if it works without issue.
  • Inspect the Power Cord: Examine the power cord of the Roomba’s charging dock for any signs of damage, wear, or fraying. A damaged power cord can lead to inconsistent charging and trigger Error 8.
  • Try a Different Outlet: If there’s any doubt about the power supply, try moving the charging dock to a different outlet. This can help you determine if the issue is with the original outlet or the Roomba itself.
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Fix 7: Cleaning the Roomba’s Sensors

The Roomba relies on various sensors to navigate and operate efficiently. Dirty or obstructed sensors can sometimes cause errors, including issues with charging. Cleaning these sensors can be a straightforward fix to the Error 8.

  • Locate the Sensors: Refer to your Roomba’s manual to locate all the sensors. These typically include cliff sensors, wall sensors, and bump sensors.
  • Clean the Sensors Carefully: Use a dry, soft cloth or a small brush to gently clean each sensor. Be careful not to scratch or damage the sensors during cleaning.
  • Check for Obstructions: Ensure that there’s nothing blocking the sensors, such as accumulated dust or debris. Clear obstructions if any are found.

Fix 8: Contacting Roomba Customer Support

If all the above steps fail to resolve the Error 8, it may be time to seek professional assistance. Contacting Roomba customer support can provide you with additional insights and solutions.

  • Gather Necessary Information: Before contacting customer support, gather all relevant information about your Roomba, including the model number, serial number, and a description of the issue.
  • Contact Support: Use the contact information provided in your Roomba’s manual or on the manufacturer’s website to reach out to customer support.
  • Follow Professional Guidance: The customer support team might offer specific troubleshooting steps or suggest sending in your Roomba for repair. Follow their guidance for the best results.


In conclusion, tackling Roomba Error 8 effectively requires a blend of simple checks and more involved steps. Firstly, ensure cleanliness of charging contacts and proper battery connection. Additionally, consider resetting your Roomba and adjusting ambient temperature for optimal function. If these don’t work, inspecting the power supply and cleaning the sensors are key. Remember, replacing the battery might be necessary for older models. Lastly, don’t hesitate to seek help from Roomba’s customer support for persistent issues. By methodically following these solutions, you can restore your Roomba’s functionality, ensuring a clean and hassle-free home environment. Stay proactive in maintenance to prevent future errors and keep your Roomba running smoothly.


What is Roomba Error 8?

Roomba Error 8 indicates a problem with the battery or charging system of your Roomba vacuum cleaner.

Can I fix Roomba Error 8 myself?

Yes, many causes of Error 8 can be resolved at home with simple troubleshooting steps.

How often should I clean the charging contacts?

It’s a good practice to clean the charging contacts every few months to prevent charging issues.

Will resetting my Roomba delete all its data?

No, resetting generally won’t erase your Roomba’s history or settings.