Question about iRobot 5800 Scooba Vacuum

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Scooba 5800 Power button Red Blinking (Continued)

Hi, I did check the voltage measurements as shown on my attached picture. I did check the power supply into the Scooba is 22V as the manual said. Step 1: it shows the battery is low (3V). Step 2: it shows the Temp. senor line is 5 V and already pumps into the battey, +/- ve terminals are almost 0V (not activated yet) Step 3: it shows the Temp. senor line dropped to 2.5V (means with load). the +/- ve terminals has slightly higher voltage that the battery. I don't know the charging voltage pattern of Scooba. (Supposes 14.4 V?) Even the Power button Blinking Red, I have monitored it for 12 hours and found the voltage of the battery is keeping growing up 10.00 V as it is only 3V at the beginning. Any advises on battery or Scooba, which one has problem? Any suggestions appreciated Thank you very much

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  • Edmund Yuen Aug 07, 2007


  • Edmund Yuen Aug 11, 2007

    Hi KOakaKO,

    Thanks you for your advice

    I will do the first step to replace the old battery by a new one before doing further studies on that. I will target to a higher failure rate device (battery).

    Thanks a lot

    Best Regards,



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As for which one has the problem, I would say it has to be the battery. Rechargeable batteries of all types are known to have similar characteristics, one of which is discharging the batteries to maintain good rechargeablility. At least one person has demonstrated this for the Scooba battery in the forums when he brought a "dead" battery back to life. He allowed the battery to slowly and completely discharge using a 12-volt automobile bulb, followed by recharging the battery on the Scooba external charger. This procedure brought his "dead" battery back to a full charge! However, other forum members have reported that many have experienced problems with Scooba battery life, and that as a consequence of this iRobot will replace your battery if you call them and report a short-life battery problem. You can contact iRobot at (800) 727-9077 if you would like to report a battery problem and request a replacement.

Posted on Aug 11, 2007

  • Kevin Omel
    Kevin Omel Aug 11, 2007

    After reading further, it appears that the number to call for warranty, repair or service information is: 877-855-8593



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1. Remove and reseat Scooba's battery, ensuring that you hear it click into place.
2. Remove and reseat the brush head
3. Remove and reseat the vacuum port and filter. When replacing the filter, be sure to press firmly into the hole. There is a magnet on the filter that must connect with the magnet on the Scooba.
4. Fill Scooba’s Clean Tank with approximately 1 cup of cold water, shake vigorously, and empty it to remove any debris in the tank.
5. Empty the Dirty Tank, refill with water, and slosh it around to pick up any sediment. Empty the Dirty Tank again.
6. Refill Scooba’s Clean Tank with water, adding a pinch or two of table salt. Run the Scooba. If the issue persists, please follow the steps below:

With the tank removed, press the Power button and then the Clean button.

If the robot tries to start a cleaning cycle, power off the robot and repeat, pressing the Power button first and then the Clean button. If the pump makes a “whirring” or squirting sound and the robot does not start a cleaning cycle (Check Tank indicator will light), this indicates that the pump is working. Replace the tank and try starting a new cleaning cycle with the tank on.

If Scooba does begin a cleaning cycle the second time you press the Power and then the Clean button with the tank removed, the pump valve could be blocked with debris. Using a turkey baster, straw or sports bottle, force water through Scooba’s solution valve. Confirm that the baster, straw or sports bottle fits snugly over Scooba’s solution valve, push water through the system at least three times, and then try re-starting Scooba.

Below is a link to a diagram of these steps for visual reference:

Title: Scooba is not putting down cleaning solution

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1 Answer

Scooba 5800 Power button Red Blinking

You probably have the manual, but here's the link to the Scooba 5800 manual anyway - just in case this would be useful to you: --> You could use a voltmeter to check the battery, but only a few months use shouldn't be enough to wear it out. If you don't have a load-tester to verify the battery's load-capacity, then you can check the voltage drop. (Assuming you can get it to contact the Scooba's circuits.) To do this, just check the battery voltage, apply a load by inserting it in the machine and turning it on, then check the battery voltage again. An excessive drop in voltage may indicate the battery needs replacing. However, the red blinking light is Scooba's indicator that it doesn't detect the battery at all. The first thing to do in this case is to clean the electrical contacts on the battery and in the Scooba. Use a damp cloth and a bit of toothpaste to rub the contacts clean on the battery and in the machine. (Toothpaste has mild abrasives in it and will clean the electric contacts without damaging them.) Make sure that both the battery and the Scooba are clean and dry before re-inserting the battery. Also, if the electric contacts in the machine are flexible matal tabs then verify that the tabs are standing up high enough to make good contact with the battery contacts. Hopefully the battery just needs it's contacts cleaned for your unit to work, but test the battery if you are sure that they are clean and seated properly to the contacts in the machine. If the battery appears to be failing, then contact to cheack and see if they are still covered under your machine's warranty. Hope this helps! :)

Aug 06, 2007 | iRobot 5800 Scooba Vacuum

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