Question about iRobot Roomba 440 Cordless Robot Vacuum

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Roomba keeps backing up

When "clean" or "spot" bottoms depressed, Roomba will only backup (as if contacting an object) or move about 6 inches in a circle, then begin backing up again. The bumper and cliff sensors are clear of debris.

Posted by Anonymous on

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Posted on Jan 02, 2017

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  • 3 Answers

SOURCE: I have the Roomba Scheduler. It just keeps going

its going in circles because it thinks it bumbing something try using commpressed air and blow out the the bumber sensors

Posted on Aug 18, 2009

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pappapumpdaf
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SOURCE: my roomba won't go forward it just spins in a

You will need to take the top off to clear those wheels.
This happens a lot when cleaning new carpet. The fuzz jams the wheel switch, and dosey do you go.

Posted on Mar 11, 2010

  • 66 Answers

SOURCE: Roomba 560 beeps 9 times; we've cleaned the

Yes, this is known issue and if your bumper moves freely, you might be facing a sensor fault caused by poor quality of components.
Here is a guide to fix it
http://www.schneordesign.com/Avi/irobot/roomba_mod2.htm
Have fun
Avi

Posted on Mar 18, 2010

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I have takin several Roombas apart with this problem. Basically the sensors on the bumber are blocked so the roomba thinks it is hitting something. I believe this is a design problem because it is so common. If you could see how the bumbers work, there is an infrared sending unit and an infrared receiving unit (they look like little LED's. when the bumper is pressed, a plastic piece moves between the two infrared led's blocking the transmission. This signals roomba to stop and backup. What happens over time is the sending led thing gets dislodged and moves slightly. The receiving led can't sense the signal so it thinks the bumper is depressed.

Hard to explain, but I have fixed the problem by shimming the led back in place and worst case, I drilled the hole in the plastic piece a little larger. Solved the problem and I have recaimed several roombas that were considered scrap. Irobot should fess up to this known problem and issue a fix for everyone of the defective units.

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