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Old 11-03-2024, 12:43 PM   #1
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Default Another TruTank mystery . . .

My TruTank sensors worked great the first couple years. Now I am having a really weird, but repeatable, problem with the fresh water sensor.

After filling to any level, the sensor will continue reading zero for several days! Then, all of a sudden, it will give the correct level. It has been sitting in our garage for a couple days reading zero, but then the reading just pops up!

Any ideas? Bad sensor? Firefly sent me a rather useless (for my problem anyway) troubleshooting guide. A new sensor is not very expensive, so I have one on order.
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Old 11-03-2024, 03:40 PM   #2
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Did you search Internet for clues? Was the system powered while filling the tank? Perhaps tank was overfilled to the level that sonic sensor couldn’t read correctly?

https://www.fireflyint.com/assets/e1...vision%206.pdf
https://www.forestriverforums.com/fo...ug-282424.html
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Old 11-03-2024, 04:49 PM   #3
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Thanks for the reply! Yes, I have been searching for a while. I will say there are a LOT of various problems with the TruTank system. None quite match mine, however.

Over filling does have a set of it's own problems, but in this case I just filled the tank a little over 1/2.
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Old 11-03-2024, 09:10 PM   #4
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Have you seen this technical service bulletin?

https://static.nhtsa.gov/odi/tsbs/20...00522-0001.pdf
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