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Old 04-20-2016, 08:58 AM   #1
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Black tank level issue

Hi all! We are enjoying our 2015 248RBS freedom express and use it quite a bit. The last few trips I've niticed that although i empty the tank completely, the black tank will still read 2/3 full. Any ideas on fixing the sensor or anything? Thanks, Peter in Florida
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Old 04-20-2016, 09:08 AM   #2
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Hi all! We are enjoying our 2015 248RBS freedom express and use it quite a bit. The last few trips I've niticed that although i empty the tank completely, the black tank will still read 2/3 full. Any ideas on fixing the sensor or anything? Thanks, Peter in Florida
Do a Search in the box at top of this Page. Days/Weeks of reading on "Sensors"! Youroo!!
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Old 04-20-2016, 05:35 PM   #3
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At the moment, mine are reading correctly. I don't expect it to last too much longer. It's only been used once so far.
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Old 04-20-2016, 06:22 PM   #4
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My sensors never worked from day 1 and haven't looked them in years. When there is water coming up in the shower the grey is full. I can hear a significant change in the noise made when flushing the toilet when the black is getting close.


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Old 04-20-2016, 06:28 PM   #5
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Hi all! We are enjoying our 2015 248RBS freedom express and use it quite a bit. The last few trips I've niticed that although i empty the tank completely, the black tank will still read 2/3 full. Any ideas on fixing the sensor or anything? Thanks, Peter in Florida
Read other threads as suggested. The short answer is that your sensors (or sensor areas) are most likely covered with TP or waste due to inadequate flushing out of the black water tank. Just dumping it out won't "do" it, and most likely insufficient water was used when flushing the toilet during use. That tank needs lots of liquid.
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Old 04-20-2016, 06:58 PM   #6
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We have tried a lot of "fixes", but they mostly fail. The only thing that works consistently is a black tank flush, which we have on this trailer.

If you don't have one, they can be installed, and it is usually not that difficult or expensive.
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Old 04-21-2016, 01:13 PM   #7
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Thanks all!
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Old 04-21-2016, 02:15 PM   #8
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Inaccurate sensor readings

Best thing to do is get your hands on some poop eating, sensor cleaning, nano bots. However, since they cost millions of dollars and are only available from the Department of Defense, I would probably go with plan "B"...which is to use the "GEO method". Information about it is available through this site or on the web. Good luck!
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Old 04-21-2016, 06:19 PM   #9
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I've had 5 class A MHs. None have had accurate readings all the times. I haven't had the newest one long enough to be able to tell. We only took it once for 5 days, and didn't have sewer hook up. Some days it showed 1/2, the next check was full, next check was 1/4 and on and on.
The MH I had before that was not accurate, until I used a liquid cleaner a couple of times. Then I always made sure I had plenty of water, and had around 3/4 full before I dumped, and flushed the tank. That seemed to help a lot.
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Old 04-21-2016, 06:45 PM   #10
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Best thing to do is get your hands on some poop eating, sensor cleaning, nano bots. However, since they cost millions of dollars and are only available from the Department of Defense, I would probably go with plan "B"...which is to use the "GEO method". Information about it is available through this site or on the web. Good luck!
On your next trip, empty the black tank, dump a gallon of SuperClean in the toilet and about 5 gal of water and drive home. When you get home, finish filling with clean water and let set for at least 24 hrs and then drain. Would also help to drive around with a full tank before emptying.
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