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Zion Slumber Firefly level indicators for grey and black water

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LawrenceSolomon

RVF Regular
Joined
Jul 25, 2021
Messages
22
After draining all waste water from my 2022 Zion Slumber, I note that the Firefly level indicator will indicate 33% full for black water. The grey water shows 0%. Why doesn't the black water indicator show 0% as well? Thank you
 
I have the exact same issue. As an RV veteran I just assumed the sensor is fouled. I am going to try putting ice down the toilet, driving around and seeing if that clears it.
 
Both my husband and Roadtrek Customerservice tell me the sensors are very finicky. If there is any oil or grease toilet paper shreds etc. they will probably not be accurate. We don’t really worry too much about what the firefly says, we kind of have a better sense of where we might be than what the computer is telling us. Roadtrek did tell us what you’d have to do, but not worth the bother, so I do not remember what they said.
 

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