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For more detailed information, visit: www.irobot.com 29
Frequently Asked Questions
Why does Roomba’s Side Brush occasionally spin backwards?
When caught on items such as carpet tassels or wires, the Side Brush
may spin slowly or briefly spin backwards to free itself. This may also
occur on thick or high-pile carpets. If this behavior should occur on hard
floor surfaces or when no tassels or wires are present, the Side Brush
should be cleaned. Using a small Philips head screwdriver, rst remove
the screw from the center of the Side Brush. Next remove the Side Brush
and thoroughly clean any hair or debris that is wrapped around the shaft.
Then reinstall the Side Brush and Side Brush screw.
Why does Roomba occasionally make a thumping sound?
When Roomba’s brushes encounter items such as carpet tassels or wires,
the brushes will briefly reverse direction to get free. This action causes
a thumping sound that can be heard approximately once per second
until the brushes are free from obstruction. If Roomba makes a thumping
sound when no tassels or wires are present, the main brushes should be
cleaned as described on page 19.
Why doesn’t Roomba slow down as it approaches certain
obstacles?
Roomba uses its Light Touch Bumper technology to identify walls and
other obstacles, allowing it to slow down and gently touch the obstacle
with its bumper before changing direction. Roomba may be less effective
at sensing and slowing down for extremely dark or black surfaces, or for
objects that are less than two inches wide.
TIP: For additional assistance, visit www.irobot.com/support.
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