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Old 09-06-2016, 01:04 PM   #1
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Question black water tank sensor

the sensor for our black water holding tank ALWAYS says 1/3 full. we have cleaned and flushed several times to clear it but no success. can anyone tell me what else I need to do or can do to clear this sensor. I have a 2014 V-Cross 315. Thank you for any and all help!!
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Old 09-06-2016, 01:20 PM   #2
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Does it ever say 2/3 full or full? Or does it always just stay at 1/3?
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Old 09-06-2016, 01:20 PM   #3
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I have the same issue.
I have tried the calgon stuff. It helped some, went down one bar.
Add 5 gal of water next time you drive to your park. it may move around and free up or clean up.
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Old 09-06-2016, 03:04 PM   #4
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Quote:
Originally Posted by nomad297 View Post
Does it ever say 2/3 full or full? Or does it always just stay at 1/3?
Yes It does go to 2/3 & full. Would love for it to say EMPTY when it is empty.
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Old 09-06-2016, 03:05 PM   #5
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Will deffinatley try the 5 gal of water when we go next. THANK YOU so much.
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Old 09-07-2016, 12:20 PM   #6
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You can pull the sensor out and clean it. That should fix the problem. Had to do that with mine once.
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Old 09-07-2016, 12:29 PM   #7
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The problem is usually film between the probes, not on them. Try s high velocity water jet cleaner rotate and change levels, have someone read the lights as you clean.
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Old 09-07-2016, 12:31 PM   #8
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Black Water Tank problems

Let me pass along an old "remodeler's trick". After dumping and flushing your tank, add a couple gallons (2) of clear water and then add one gallon of vinegar. Drive home as normal and allow it to swish around in there and then dump it again near home. Should solve your problem. We've been using this system for years, both on our rig and restoring previously "used" toilets most people gave up as lost... saved thousands of dollars over the years... which helped pay for the new RV!
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Old 09-07-2016, 12:48 PM   #9
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If the film wasn't also on the probe it wouldn't make contact. Cleaning will help.
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Old 09-07-2016, 02:42 PM   #10
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I had/have the same problem it has been to the dealer to fix and that is the only time other than when brand new that I read empty, I have back flushed and back flushed and it still reads 1/3. I quit carrying and know it's empty even though its 1/3. I have done the 5 gallon thing and always the same
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