At start goes normally for a few seconds forward in circle, then stops like it hit something, starts going backwards in circles for another few seconds then stops completely with red led on on status..
I had the same kind of problem with my model 400 today...after starting it and having it go in a circle for 30 seconds or so it would finally run into something and then back up a few inches, turn, then go forward a few inches, then back up a few inches, turn, then go forward a few inches, etc., etc.. I tried cleaning off the four pairs of sensors under the bumper and blowing out various things underneath (by mouth since I didn't have any canned compressed air). It didn't really help. It then occurred to me that I had a leaf blower! I put the Roomba upside down on the grass, put the leaf blower on high, and blew at it from all directions and up close. More dust came out than I thought would. It has been running normally now for the last 45 minutes.
Posted on Sep 14, 2008
I turned my shop vac onto "blow" and blasted my roomba with this problem. It worked!!! I had already cleaned it thoroughly, but it needed to be blown out. My only regret is that I did it in my shop, rather than outside. It was pretty dusty.
Thanks again for the tip. Saved me $100+
Posted on Dec 10, 2008
Usually with ROOMBAS the culprit is dust buildup. Blowing/cleaning is the fix for that. But when all is clean and it still does the same backward dance, the problem will be one of the cliff sensor pairs have gone bad. This then requires replacing components. But first step is to always clean the roomba.
Posted on Jul 24, 2010
Http://www.protechrobotics.com/proddetail.php?prod=324544
Posted on Jan 08, 2013
Cleaning is a temporary solution. One of the components in the bump sensor degrades over time. The permanenent solution to the 9-beep problem is to replace the component. Do-it-yourself ktis are the best way to go. There are solderless and soldered solutions available. Just need to google it.
Posted on Dec 15, 2012
Fixed it on the spot thank you for that piece of redneck engineering
Posted on Nov 01, 2008
Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
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goodluck!
Posted on Jan 02, 2017
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Vac will attempt to move forward but will the quickly move backward. It continues at about the same frequency to attempt to move forward then moves backward again. Have cleaned vac and sprayed with compressed air to clear sensors.
I had the same problem including the status light. I discovered by
placing the front wheel on a table then turned it on and selected clean.
The brushes weren't turning, further investigation proved that the
brush motor was fried. Replaced motor, still having some problems.
Whatever caused the motor to fry may still be present, but brushes do
seem to be turning when I did the same test.
Once a while, my one starts to move backward and turn around. Lift it and claps it couple times, most time it works normally again except this time...
my robot NO> JEN 44002 100713 09 00721 will only go in circles whenit bumps something it just keeps on hitting the object won't reverse and go on when in the middle of the room it just goes in a circle acts as if it it is hitting something it has a new batterie in it
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