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Old 05-19-2017, 02:05 PM   #1
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Black Tank Sensor

At my control panel the black tank is reading full even after it dumped. I tried flushing out the tank several times thinking maybe something was stuck near the sensor however problem still not fixed. Has the sensor just gone bad? Anybody had this problem and know the fix? Thanks
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Old 05-19-2017, 02:13 PM   #2
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common problem, lots of posts, do a search. here is one solution.

RV Holding Tank Sensors - Get accurate grey and black holding tank monitor readings
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Old 05-19-2017, 02:19 PM   #3
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Why get a endoscope smartphone camera to look inside your black tank?
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Old 05-19-2017, 02:54 PM   #4
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Quote:
Originally Posted by FireSurf View Post
At my control panel the black tank is reading full even after it dumped. I tried flushing out the tank several times thinking maybe something was stuck near the sensor however problem still not fixed. Has the sensor just gone bad? Anybody had this problem and know the fix? Thanks


Yes I did have that problem on my 2015 30DS. It was bad wiring and was replaced under warranty. I installed what come comes standard now, a black water tank flush. Even using that sometimes results in an inaccurate reading.
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Old 05-19-2017, 02:59 PM   #5
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Troubleshooting sensors is not hard (though getting to them may be).

Here is a great troubleshooting manual and everything you need to do the job except a cheap multi-meter from Harbor Freight.
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Old 05-21-2017, 08:41 AM   #6
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Google SeeLevel RV tank monitor. No in tank probes to give you a false reading.
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Old 05-21-2017, 11:49 AM   #7
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I second the Horst Miracle Probes. They made a huge difference when I put them in my previous camper, so I put them in my new one before we even used it.

They occasionally don't read empty immediately after dumping, but if that happens they clear after a short time. I usually use the built in black tank flush and they always read empty after that.

The stock probes in my old camper would sometimes give false readings even after using the black flush.

If you can easily see and get to the probes, they're not difficult to install.

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Old 06-22-2017, 11:33 PM   #8
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Because the blackwater tank is directly below the toilet, a flashlight is all you need to determine the level of fluid in the tank. Of course it would be nice if the annunciator display operated properly!
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Old 06-23-2017, 06:02 PM   #9
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I always put 1 gallon of fresh water in the black tank after I flush it this seems to help keep it rencedwhen driving
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Old 06-23-2017, 06:06 PM   #10
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Quote:
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At my control panel the black tank is reading full even after it dumped. I tried flushing out the tank several times thinking maybe something was stuck near the sensor however problem still not fixed. Has the sensor just gone bad? Anybody had this problem and know the fix? Thanks
ctl

There's a piece of toilet paper stuck on the sensor.
Don't worry about it. Next time you use the camper/toilet, it will read correctly.
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