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Old 03-25-2016, 03:01 AM   #15
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If you can look straight down into the tank with the toilet open that is your sensor! I always note on the computer calendar when I dump. Hot weather I dump every week and cooler every two weeks. I have the new fancy sensors on our 16 MobileSuites but who cares!

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Old 03-25-2016, 12:25 PM   #16
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Thanks so much for all your info on this subject. We have used Calgon and Dawn, Tide and nothing seems to work. We can't drive it around as it is down permanent. It is new they worked for a little while then stopped. Don't care when it's just the hubby and me but being in Florida we get a lot of company and it's then we would like to know the levels. We do the back flush all the time when emptying. This is not our first RV we have had 4 5th wheels and 2 motor homes. None of the tanks in any of those read full after emptying and flushing like this one does. We thank you all for your helpful comments.

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Old 03-25-2016, 12:51 PM   #17
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I just looked at the Heartland website at the Big Country trailers. You have a black tank flush.

If you are on water and sewer hook ups, then drain the tank, run the flush for a long, long, long time, occasionally allowing the tank to fill with some laundry detergent in it (don't be afraid to add double or triple the amount of detergent you'd use for a load of laundry) and let it sit so the detergent can do some work.

Then drain the tank while running your black flush for a long, long, long time (hopefully your water is cheap or not metered).

I did this in my trailer, adn the black tank sensors have been untrustworthy for months. I now have working black tank sensors. I don't expect them to work later, but they work now.

Use lots of water to flush that tank, let it fill with "clean" water and detergent, drain, rinse, repeat, ad nauseum. It might work. If it doesn't look for a tank cleaning wand. You'll need to know if you toilet drains straight down directly into the black tank or if there is a bend in the pipe. There may also be a nearby "black tank cleaning service" that will come to you.

Over time, if you are able to get your black sensors back, expect them to not be reliable again, and soon. You probably already knew this.

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black tank, tank

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