Question about iRobot Roomba 4210 Bagless Robotic Vacuum

Battery light goes red after bumping/backing up

This just started. After running just fine, and running completely out of battery "juice", I recharged the battery and set the Roomba down in another room. I started it up, it ran to a wall, bumped and immediately the battery light went red. When I put it back in the charger, it went green in less than 1 minute. I ran it again and it bumped into something, backed up and went red. I took out the battery pack, cleaned the contacts and some dust/lint, popped it back in and the light went green. Restarted and the same result. Any ideas?

5 more comments
lynnagriff Sep 01, 2008

Mine runs in circles backwards after running for just a few seconds normal.
matthew21076 Sep 21, 2008

Same thing here. This vac is 3 years old, has had the firmware upgrade. I've cleaned EVERYTHING on it, and ran the 21 diagonostics, which found only the left tachometer to be in fault mode. But the new firmware is (supposedly) designe to ignore the tachometer reads on this model. In the diagnostic mode, ALL other features work perfectly, backing, RT, LT, brushes, vac, etc. But in normal cleaning mode (SPOT, CLEAN, or MAX) the machine moves about 2 inches, stops and shows a RED power light and orange status. HELP!
Anonymous Oct 12, 2008

I have the same problem. I'm hesitant to throw money at a new battery when I'm not completely sure that is the problem.
asknursetiff Oct 23, 2008

Same problem here. I was going to order a new battery because I read somewhere else that there is a problem with Roomba brand batteries in how they are wired, and after charging and recharging over a year it dies. BUT, I don't want to spend the money unless I know that is the problem...
CaseyMarie Oct 27, 2008

I have the same problem. I discharged the battery fully, then recharged, but when I turn it on it immediately turns red and stops. Is it the battery?
Anonymous Nov 22, 2008

Same problem. Charge. Light Green. Turn it on. Press Clean. Runs several seconds backward and then immediately shuts off, giving the low battery sound.
ghyatt7 Feb 11, 2009

iRobot Roomba 4210 Bagless Robotic Vacuum went under sofa after only 15 minutes and gave a status alarm and power light went red. My machine came with no manual. It's brand new. Guess I'll have to return it for one with paperwork. Can tell it has been used.

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Marty marty

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883 Answers

Try this: turn it upside down and run it-then bump it to reverse it...same result?

Posted on May 29, 2007

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Battery light goes red after bumping/backing up

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Battery light goes red after bumping/backing up

1 Answer

Marty marty

1 Suggested Answer

6ya staff

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