Stuck on check tank indicator

If your Scooba's Green Check Tank light is coming on immediately on startup, please try the following steps:

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
http://homesupport.irobot.com/cgi-bin/irobot_homesupport.cfg/php/enduser/std_adp.php?p_faqid=322&p_created=1167154849

Next suggestion is for those who did everything according iRobot and destiny brothers suggestions on the Web. Fort those who did everything (washing, primming, testing ect.) and are still stuck with Check Tank problem.
Suggestion is for those who understands little bit Scooba's internals and how it is functioning.
I only share my experience, so try it at your own risk!


The problem with Check Tank signal lays to the next roots: Dirty-Tank's High-Limit level-sensor (see Figure 5. 'Electrical-Connector To High-Limit Sensor In The Dirty-Tank' on http://mysite.verizon.net/gsplews/Tanks_details.htm ) sends wrong signal to the Scooba electronics. This sensor is resistor-based and is in low resistance as Dirty Tank fluid level reaches certain level and in high resistance if fluid level is low in Dirty Tank.
What I faced in my case Dirty-Tank's High-Limit level-sensor still is in low resistance mode while Dirty Tank is totally empty! I don't know exactly why it is like that; my guess sensor is is impure and washing procedure for Dirty Tank is not helping anymore.
Solution is next: you need to eliminate Dirty-Tank's High-Limit level-sensor. For this take small peace of sticky tape (thin one, but with good electrical insolation) and put around Electrical-Connector To High-Limit Sensor In The Dirty-Tank (see Figure 5. 'Electrical-Connector To High-Limit Sensor In The Dirty-Tank' on http://mysite.verizon.net/gsplews/Tanks_details.htm ) You need very small peace of tape, just one layer. Don't put to much, as Connector still needs to fit to Scooba base.
That is it.
By putting tape on Sensor Connector you send “Dirty Tank is Empty” signal to Scooba Electronics and Check Tank problem should be gone and you run Scooba with no problems.
Keep in mind, you have modified Scooba version now!
This version has NO Dirty-Tank's High-Limit level-sensor functioning anymore! So run it at your own risk.
To run such modification keep next rules:

1. Always check if Dirty Tank is empty before running next cleaning cycle (as Dirty Tank Level sensor is not functioning you need visual inspection)
   
2. NEWER run Scooba to to collect any spill fluid as you might overfill Dirty Tank (remember, Dirty Tank sensor is blocked by tape).
   

Same problem, nothing worked so I just happended to stick my finger in the dirty tank and I found a HUGE wad of hair and muck lodged just inside the dirty tank apparently blocking the flapper. Took a bit of work with tweezers, a coat hanger and needle nosed pliers but I got all the junk out and Scooba is working great.

Prime your Scooba's pump before first use.
1, Find out the Solution Valve
2, Tp prime pump, fit the end of thr included suction bulb over the solution valve. Push air through the pump system 3 or 4 times. Keep Scooba's suction bulb. If Scooba is not used for 30 days or more, you may need to re-prime Sooba's pump.

OK, I've had the same problem and solved it (for myself, anyway - I hope it helps others as well ;) ). I looked inside the DIRTY tank and it was all covered with a slimy ugly substance, which was not easy to remove, but I have used irrigator to remove it, and it did a pretty good job. For those who doesn't know what irrigator is (and to avoid language barrier) - irrigator is that water pressure based mouth-cleaning thingy, which cleans the spaces between your teeth. After rigorous cleaning I have snapped the tank back into Scooba and it works like a charm ever since. I had to replace the irrigator jet though, for I am NOT putting that thing back into my mouth EVER again... LOL I hope this helps others with the same problem as it helped me. ;) :)

Had the same problem and tech support told me I needed a new one! I used the "turbo snake" to snake out the system from the bottom, and then flushed the system from the bottom. I got a wad of stuff out and it is now workibng great. If you don't have a turbo snake they are great - it has a special designed head that grabs hairs, etc and does not let it go, and it is small and flexible.
Peedee

Just had same problem... when priming, put water in the primer bulb... this gets water flowing...

I used a miniature screwdriver to stretch out the metal contacts that are located in the square recessed hole under the words "Eject brush" in the base. Also, I made sure that the tiny wires on the tank portion of the scooba that come into contact with these contracts were clean and I pulled them a litte sideways with the mini-screwdriver to maximize the contact.

This is the weirdest solution yet. My scooba started behaving badly about 2 months ago. The check tank light kept coming on and it only ran for 10 - 15 minutes at a time. I bought a new battery but the same thing happened. I tried priming the pump but that did nothing.

I ended up putting the tank back on the scooba but I did not press it into place. I just let it sit on top and hit the power button. The check tank light did not come on. Then I pressed the cleaning button and it started working again. However, I does only run for a few minutes at a time. I'll see if I can figure that one out.

Sometimes this happens and I fix the problem by priming the thing with water with the blue bulb they give you. Recently that didnt fix the problem, this past time it was fixed by flushing the dirty water tank out. I just filled it half way with water a few times and swished it around. Now it's working again.

I had the same problem with my scooba's check tank light and the thing that worked for me was removing the battery. it resat the machine and now it is cleaning my floors... i never had to prime it and i use water only... loving it!

Had the same problem, followed the advice of cleaning with water and shaking. i also put water with white vinegar in it and shook it around, let it sit about 10 min and shook it again. it cleaned it out after that. the best soluation i found to this problem is to clean it after every use.

I had 2 things wrong and solved a tire tread problem by replacing it. Took me awhile to figure this out.

After that SCOOBA wanted to be CLEAN.
Since he was clean I went to irobot site and learned the following..

1. You can prime the pump/solution valve with a PEN and you need to do that if you haven't used SCOOBA for a long period of time. I didn't use scooba for awhile because of the tire tread problem.

2. If you do not use iRobot recommended cleaning solutions - scooba may not know his tank is full and CLEAN.

Thhhhhat's all folks. My scooba is working great as usual..