Question about iRobot 5800 Scooba Vacuum

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Light is flashing and saying check tank. tank is full.

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Empty the tank, then fill the clean tank with plain water. Add a pinch of salt. Put the tank back on the Scooba and try it out. The problem is that Scooba's tank sensors rely on the conductivity of the fluid in the tank to guage the presence of clean solution. Adding a pinch of salt will increase the conductivity and should trip the sensor.

Posted on Sep 29, 2008

  • maria haddon Sep 19, 2012

    I have tried everything to get my Scooba going again. Your little pinch of salt trick did it!!! Thank you, thank you, thank you

  • maria haddon Sep 19, 2012

    I have tried everything to get my Scooba working again. Your little pinch of salt trick worked!!! Thank you, thank you, thank you


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Did you empty the tank?

Posted on Aug 05, 2008

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Posted on Jan 02, 2017

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Bissell spot bot

Per the manual, periodically you should clean the rubber lining in the dirty water tank(it comes out). I found mine a little dirty, but after cleaning it, it solved my 'all lights flashing' problem.

I have a feeling is this the solution for most people whose manual mode works fine but, automatic mode stops with lights a' flashing. Why manual still works though is a mystery to me. You'd think all modes wouldn't work then.

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