Tank Sensor Wiring Diagram

edatlanta wrote:
After 6 years full time my black tank reads full all the time except immediately after a dump when it reads 1/3. But after a few hours and minimal use it reads full again, but will not be full for a couple of weeks.

I think it is haunted, but I absolutely know when it is really full. It burps when flushing and I dump it. Works like a champ.

Heh, guess my black tank has never been that full.

When I think it's getting full, I turn off the water, open the big valve, and peer down inside the toilet into the tank with a flashlight to see just how full it is.

A little gross but definitive. (No worse than the whole dumping business)

After 6 years full time my black tank reads full all the time except immediately after a dump when it reads 1/3. But after a few hours and minimal use it reads full again, but will not be full for a couple of weeks.

I think it is haunted, but I absolutely know when it is really full. It burps when flushing and I dump it. Works like a champ.

4 sensors......
3 for level and 1 for ground

Probably can't fix it from the panel. There are probably 3 sensors tied into a resistive network.
Need to find them on the tank itself.