Question about iRobot Roomba 4210 Bagless Robotic Vacuum

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After installing a new battery after not using Roomba for over 1 year it will not drive straight

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  • Daveyon Mayne
    Daveyon Mayne Sep 25, 2010

    What model Roomba is this?

  • myronsconstr Sep 25, 2010

    model #4210

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  • 28 Answers

Ok. What I would do is to disassemble the Roomba, clean both its wheels, Cleaning Head Module (including the gears) and the front bumper sensors. If after cleaning the front bumper sensors and same problem...you will need to replace the sensors. It's more than likely one or more of the IR LED are damaged.

Posted on Sep 26, 2010

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1 Answer

My robot wont work even with a new battery


Once of the problems with batteries is they tend to corrode the metal contacts. Try lightly scraping on the metal battery contacts inside the Roomba and also on the battery with a small screwdriver...this creates a clean surface and allows conduction between the battery and the Roomba.

Dec 24, 2014 | iRobot Roomba 560 Robotic Vacuum

1 Answer

What are these 2 blinking lights on my irobot roomba?


"The Charge Indicator Light is located immediately to the right of the power button on Roomba Red and Roomba (sage). On Roomba Discovery and Discovery SE, the Charge Indicator Light is incorporated into the power button. Please refer to the table below to determine what the Charge Indicator Light is telling you.

* Pulsing Amber - Charging
* Green - Fully Charged
* Amber - Partially Discharged
* Red - Almost Fully Discharged
* Flashing Red - Fully Discharged"
At the end of a cleaning mission, Roomba will tell you if it has successfully completed it's mission or not:

GREEN = MISSION COMPLETE

YELLOW = MISSION ABANDONED (Check robot's brushes, etc.)

YELLOW RED POWER BUTTON = BATTERY DEPLETED (Scheduler Models)

RED YELLOW POWER BUTTON = BATTERY DEPLETED (Discovery Models)
number of beeps after ?uh-oh? :

No beeps: A wheel is stuck or is not touching the ground. Pick up the robot, place it down securely on the floor and touch the clean button to restart the cycle.

1 beep: The main brushes cannot turn. Turn over Roomba and remove the brush guard by pushing the two yellow tabs. Remove the brushes, clear any obstructions, and replace them again.

2 beeps: The side brush cannot turn. Turn over Roomba. Look to see if something is wrapped around the side brush. Remove the side brush with a screw driver and check for string or hair that may be wrapped around it.

3 beeps: The vacuum cannot run Remove and empty Roomba?s bin.

4 beeps: A wheel motor cannot run Your Roomba may be stuck or something may be wrapped around a wheel. Look for something wrapped around the wheels. Push them in and out and make sure they turn easily.

5 beeps: The cliff sensors have failed or are blocked. Turn over Roomba and clear any debris that might be caught underneath the front bumper in the cliff sensors. You can also use compressed air to clean them out.

6 beeps: Wheel obstruction or robot attempting to drive over an obstacle. Turn over Roomba and remove any obstructions that prevent the wheels from seating all the way up into Roomba?s body. Also, remove any obstacles that Roomba could drive over.

7 or 8 beeps: Not applicable Roomba?s beep codes do not include 7 or 8 beeps. If you are getting an error with 7 or 8 beeps, try counting again or contact iRobot Customer Care.

9 beeps: Sensor error Please contact iRobot Customer Care.

10 beeps: Roomba is stuck Pick up Roomba and start it again somewhere else. Use a virtual wall or other barrier to keep Roomba away from the
place it got stuck.

Your Roomba may be experiencing an issue where the battery is deeply discharged and may need to charge longer than the standard 3 hours. (or 7 hours if you have a standard charger)

Even with the charging light showing green (this indicates a fully charged battery) the robot is still charging. If your Roomba exhibits behavior where it charges for a short time then runs for a short time you will need to do the following.

1. Plug the charger into Roomba (if you have a home base be sure to plug directly into Roomba instead of using the home base, this will ensure the robot's charging cycle is not interrupted.)

2. After the Roomba's charging indicator goes to solid green please keep the Roomba on the charger for an additional 72 hours. (3 days)

3. After the 72 hours (3 days) has passed, turn your Roomba on and begin a normal cleaning cycle. If this works successfully it may take several uses for the battery to get back up to the performance it once had.

If this does not correct the problem, please call customer support at 877-855-8593

Nov 22, 2012 | Vacuums

2 Answers

Roomba going in circles


Roomba going in circles. Called irobot and if reseting it (by taking out the battery, unplugging it from the charger, and holding down the power button for 30 seconds), didn't work, turn the roomba over, take a compressor and blow air into the front. Maybe a shop vac would also work. We cleaned out the whole thing while we were at it. And now it works just fine. The tech person at irobot was very helpful.

Mar 14, 2010 | iRobot 530 Roomba Vacuuming Robot, White...

1 Answer

Turns in circles, acts like it hits a virtual wall then stops


Reboot is probably not your solution. Your Roomba will react to invisible signals or 'interference' from other electrical appliances as well as the invisible wall boxes. You can clearly see how this happens when a Roomba gets near your computer or other device that is on. Also, the Roomba will go in circles when the dirt chamber is full or it thinks it's full. Try a thorough clean of all major parts including the brushes. Sometimes this activity will occur when the brushes get snarled on thread or carpet fibers.

Oct 09, 2009 | iRobot Roomba 4210 Bagless Robotic Vacuum

1 Answer

I have the irobot roomba and the battery does not hardly hold a charge and now it won't go forward just backwards and around


The Roomba has a rechargable Battery. The Roomba battery like any battery will eventually ware out after so many charges and discharges. Mine lasted about three years and then is would hardly hold a charge. I purchased a new battery and then it worked fine after that.

As for not going forward. That is usually due to a dirty bumper sensor. You have to take the Roomba apart for cleaning that. You can take it to Sears and they will do it for you.

Oct 01, 2009 | iRobot Roomba Discovery SE Bagless Robotic...

2 Answers

Model4210battry won't recharge, is it worth ordering a battery?


don't buy a new battery yet. you can reset the battery by charging for 16 hours, if this does not work, you need to take the battery out, push and hold the power button on your roomba for at least 15 seconds then reinstall the battery. plug in the charger directly to roomba not the docking station and charge until the battery light on the roomba is green. do not interrupt the battery charging cycle. after, leave the roomba charging for an additional 3 days or 72 hours. after, run roomba in max mode and run it till the battery is completely depleted. this will improve the battery overtime by charging again for 72 hours and depleting the battery. do this 3 or 4 times. and the battery should get better

Jun 28, 2009 | iRobot Roomba 4210 Bagless Robotic Vacuum

1 Answer

Roomba shuts down after a few minutes


The brushes are clean on the outside, but probably not inside of the little yellow contact on the end. Also the junk that collects on the brushes finds its way into the gear box. Mine kept shutting down w/ the "Please remove and clean Roomba's brushes" message. I finally gave up and took it apart. There was a surprising amount of junk in the gear box. After I got it apart, I cleaned it out and I even used a straight pin and a pair of tweezers to get all of the gunk out. Now it runs like new. I'm no mechanic, but I used to help my daddy fix things around the house. I posted my solution to the problem and it has worked for a couple of other people too.

Dec 15, 2008 | Roomba Robotic Floor Bagless Vacuum

1 Answer

Roomba does not do anything


My Roomba has had a battery issue for some time now. I haven't used it in quite a while (months, years, I don't know for sure) because it would complain of a discharged battery after only a few minutes of cleaning. However, now when I finally tried to use it again, a new problem appeared.

Now, it charges normally, if I plug the cord directly into the Roomba. It will not mate with the home base, however, even if I place it on the contacts manually.

When I start it, all the buttons come on green. I then press a button to make it begin cleaning. The motor whirs up and runs for about 1 second, then it shuts down. About one second later, the power light and lights behind whichever button(s) I pressed (to give it a job) flash green then the system sits silent, and doesn't do anything else.

May 31, 2008 | Roomba Robotic Floor Bagless Vacuum

1 Answer

Roomba 4200 Scheduler


The best for the battery if (NiMH). Discharge completly, than charge full (charge more even the charger indicates full charge)

Clean every part, maybe a hair slow down the wheels and thats why need more power.

Here some tip from the web:


With proper care, one iRobot Roomba battery can last for hundreds of cleaning cycles before you need to replace it. Here are some things you can do to extend Roomba's battery life and keep Roomba cleaning at peak performance:



Use your Roomba frequently. Your Roomba is powered by a rechargeable nickel metal hydride (NiMH) battery, which lasts the longest when you use it regularly.



Keep the brushes clean. If the brushes and brush axles get clogged with hair and other debris, your Roomba will strain to spin them, using more battery power than normal. In extreme cases, the battery can even be damaged. See How to remove and clean Roomba's brushes



Keep your Roomba plugged in when not in use. If you have a Home Base®, keep your Roomba docked in the Home Base and plugged into the charging brick. If you don’t have a Home Base, keep your Roomba plugged into the APS Fast Charger.



Make sure you are charging your Roomba correctly. When your Roomba is plugged in correctly, the solid green light should be illuminated on the charger or on the Home Base.



Plug your Roomba in as soon as possible after using Max Mode. Leaving your Roomba unplugged for more than 24 hours can damage the battery.



Place your Roomba and the Home Base on a smooth, hard surface when yourRoomba is plugged in. Make sure your Roomba and the Home Base have plenty of space for ventilation. Do not charge your Roomba on a carpet or rug.



Charge and store your Roomba in a cool, dry place. Keep your Roomba out of direct sunlight and away from sources of heat such as windows, radiators, heating vents, and large appliances.



Remove the battery when not using your Roomba for a long period of time. If you will not be using your Roomba for more than a few weeks, fully charge the battery, remove it, and store it in a cool, dry place. When you want to use your Roomba again, insert the battery and fully charge it. Leaving your Roomba plugged in for weeks when it is not being used can damage the battery.

You can purchase a second battery or replacement online at the iRobot Store.

Nov 11, 2007 | iRobot Roomba 4210 Bagless Robotic Vacuum

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