Troubleshooting Guide: Fixing Roomba Error 15

Roomba is a popular robot cleaner known for its convenience and efficiency. However, encountering an error, such as Error 15, can disrupt its smooth operation. Error 15 typically indicates a battery calibration issue and commonly occurs after installing a new battery or when the battery needs replacement. In this comprehensive troubleshooting guide, we will discuss effective solutions to resolve Roomba Error 15 and get your Roomba back on track.

Reset the Roomba

When facing Error 15, a simple reset can often do the trick. Follow these steps:

  1. Turn off the Roomba.
  2. Take the battery out.
  3. Wait for a couple of minutes.
  4. Reinsert the battery into the robot.
  5. Power on the Roomba and check if the error code disappears.

Calibrate the Battery

If resetting the Roomba doesn't resolve the issue, battery calibration is the next step. Follow these instructions:

  1. Charge the battery to 100%.
  2. Run the Roomba continuously to allow the battery to drain completely.
  3. Recharge the battery to 100% and repeat this process two more times.

Clean the Charging Contacts

Dirty or obstructed charging contacts can hinder the battery's charging process, triggering Error 15. Follow these steps to clean them:

  1. Ensure the Roomba and Home Base are turned off and disconnected from the power supply.
  2. Gently clean the charging contacts on both the Roomba and the Home Base using a soft cloth to remove any dirt or debris.
  3. Once the contacts are clean, reconnect the Roomba to the Home Base and power it on to check if the error persists.

Check the Power Supply

A faulty power supply can affect the battery charging process, leading to Error 15. Follow these steps to troubleshoot:

  1. Inspect the cables and connections between the Roomba and the Home Base.
  2. Ensure that all connections are securely plugged in and not loose or damaged.
  3. If necessary, try using a different power outlet to rule out any issues with the current outlet.

Replace the Battery

If all previous steps fail to resolve Error 15, it may be necessary to replace the Roomba battery. Here's what you need to do:

roomba error 15 fix by replacing the battery
  1. Identify the Roomba model and find a compatible replacement battery.
  2. Purchase a new battery from Amazon, Ebay, or any other authorized retailer including the Roomba manufacturer.
  3. Follow the manufacturer's instructions for replacing the battery.
  4. After replacing the battery, power on the Roomba and check if the error code disappears.

FAQ (Frequently Asked Questions)

Q1: How often should I calibrate the Roomba battery?

A1: It is generally recommended to calibrate the Roomba battery every 2-3 months or whenever you install a new battery. This helps ensure optimal performance and accurate battery level readings.

Q2: Can I use a third-party battery with my Roomba?

A2: While it is possible to use a third-party battery, it is advisable to use an authorized battery recommended by the Roomba manufacturer. Third-party batteries may not provide the same performance or compatibility, which could result in errors or reduced functionality.

Q3: Why is it important to clean the charging contacts?

A3: Cleaning the charging contacts is crucial because dirt, dust, or debris can hinder the proper connection between the Roomba and the charging base. Unclean contacts may prevent the battery from charging effectively, leading to errors like Error 15.

Q4: What should I do if none of the troubleshooting steps work?

A4: If you have tried all the troubleshooting steps and Error 15 still persists, it is recommended to reach out to the Roomba customer support or contact a professional technician who specializes in Roomba repairs. They can provide further assistance and diagnose any underlying issues.

Q5: Will replacing the battery void my Roomba's warranty?

A5: Replacing the battery with an authorized replacement battery should not void your Roomba's warranty. However, it is always advisable to refer to the manufacturer's warranty terms and conditions or contact customer support to ensure compliance with warranty policies.


Encountering Roomba Error 15 can be frustrating, but with the troubleshooting tips and fixes outlined above, you can quickly resolve the issue. By following the step-by-step instructions, including resetting the Roomba, calibrating the battery, cleaning the charging contacts, checking the power supply, and, if necessary, replacing the battery, you'll get your Roomba back in working order. With these simple solutions, you can enjoy the convenience of a fully functional Roomba once again. If you have any further questions, comment below or shoot us a message!

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