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BillHoughton's avatar
BillHoughton
Explorer II
Oct 22, 2018

Waste tank level sensor: spontaneous remission?

On our long trip early in summer, the black water tank level sensor was convinced that the tank was full when we pulled out of the driveway. Fortunately, the toilet opens directly into the top of the tank, so I was able to monitor level visually, and we were traveling in areas with an adequate supply of dump stations.

I don't know which type of sensor we have (2007 Itasca Navion).

Since then, on a couple of shorter trips, it seems to have alternated working and not working; the last trip, it seems to have worked.

I've got an appointment in November for our RV mechanic to pull the tank and fix the sensor. My bride is questioning the necessity for this, since the sensor appears to be working right now. Do these sensors fix themselves, and, if they do, is the fix reliable?

11 Replies

  • If it's OEM (cheap) it's an immersion sensor and they all get wonky after a while. If you are having the tank pulled, install a real sensor... Seelevel is the only non contact sensor available. It goes on the outside of the tank, not inside and works by induction so it's failure proof. Candidly, I look down my toilet too.