Roomba Charging Error 4 (Fix in Just 30 Seconds)

Roomba charging error 4 is one of the most common Roomba errors and can happen especially to I and j Series vacuum cleaners.

If you have an iRobot Roomba that keeps saying “Charging Error 4” when you try to charge it, this article will help you fix the problem.

Basically, “charging error 4” means that your Roomba is connected to the charger but the vacuum not charging. This can happen when you try to charge your Roomba on a different charger than the one that came with your device.

What does Roomba Charging error 4 mean?

Roomba has a basic set of error codes, such as “charging error 8,” or “error 26” that may appear when your vacuum has a charging issue. These errors typically don’t mean your Roomba is destroyed; it can’t complete a particular task due to a specific difficulty.

Most error codes are self-explanatory, but iRobot also includes several in-depth guides on their website if you need help deciphering yours.

💡Also read: Roomba error 6 (Fixed in seconds)

Why does Roomba charging error 4 occur?

Why does roomba charging error 4 occur

There are a few reasons your Roomba may display the charging error 4 message.

 The first reason is that your Roomba’s battery may be damaged and need replacement.

Another possibility is that something is blocking the charging contacts on both the Roomba and the charging dock, preventing a proper connection.

If you have recently mopped your floor with cleaning chemicals, this can cause the same issue because it can eat away at the rubber coating on the charging contacts.

Finally, it could be an electrical issue where there is a problem with one of the wires inside of the Roomba that prevents a charge from being correctly delivered to its battery.

How to fix Roomba Charging error 4 issue?

To fix this issue, first, ensure that the vacuum’s battery is properly installed. Next, check the power cord that connects the Roomba to the charger. Ensure that the cable is plugged in correctly and that there are no loose or damaged wires. If the power cord appears to be okay, the next thing to check is the Roomba’s charging contacts. Make sure that these contacts are clean and free of debris.

The above was the one-line solution, but I will explain it in detail below. If you want to explore more, keep reading…

Step 1: Reboot Your Roomba

Reboot your Roomba

One of the most effective solutions when your Roomba is displaying this error, is to reboot it. This will help clear any errors from its memory and get your Roomba back on track. To do this,

  • Simply press and hold the CLEAN button for about 20 seconds.
  • After 20 seconds, release the button and the light ring will show a white clockwise swirl.
  • When the light ring turns off, the reboot process is over.

This could take up to a minute and a half to turn back on. Once it has been done, check to see if the problem has been solved. If not, move on to the next step.

Step 2: Clean the charging contacts

Fix Roomba charging error 4

Another possibility is that the charging contacts on both Roomba and Home-Base are dirty. There are two charging contacts in both Roomba and the home base.

Over time, dust and debris can build up on the charging pins and contacts on your Roomba and its Home Base. This can result in reduced charging performance or even prevent charges from occurring.

So, you should check and clean both contacts to ensure that your Roomba can properly connect with the home base and get charged. To clean your vacuum’s charging contacts, follow the below steps:

Clean charging contacts

  • First, unplug your Roomba and remove it from its Home Base.
  • Then, use a dry, soft cloth to wipe away any dust or debris from the charging pins and contacts.
  • Also clean the charging contacts on the Home Base itself, using the same process as above.
  • Once they’re clean, reattach your Roomba to its Home Base and plug it in.

If that doesn’t solve the problem, you may need to replace your Home Base or Power Adapter.


Q, Nothing worked! What to do?

As previously mentioned, charging error 4 typically occurs when your charger has a problem, and the electrical current can’t reach the robot.

You can fix this problem by cleaning the charging connectors on both the Roomba and the home base. But if it doesn’t work, you must replace your power adapter.

I recommend a 22.5V 1.25A AC Adapter for your Roomba, which is compatible with the 550, 595, 400, 500, 600, 700, 800, and 880 Series; 770 650 Pet 560 630 530 760 700 500 660 4210 540 and others.

I hope this guideline will help you to fix the problem. If you are still facing this issue, be sure to contact with iRobot customer care for further assistance.

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