One Tecma Won't Flush

[Eldora]

We have a master bath and a half bath in our 2014 Tuscany XTE. We've had it for just a year and no problems with systems until yesterday, and it's a real puzzle with no answer found in the manuals or online, so here I am! The black tank was emptied day before yesterday, and back flushed. Last night I noticed the lights go from green to red a few times, then stay red. This indicates the tank is full, but we know it's empty. With the display showing red, we of course cannot flush the toilet unless we override the control by holding the button for 6 seconds. We're hesitant to do that until we hear some ideas about what could be causing this. Has anyone had this problem before and/or can offer a possible suggestion or fix? TIA

[Ray,IN]

Holding tank liquid level indicators are notoriously unreliable after several months of use. Since your MH is likely still covered by the mfgr. warranty, I'd diplomatically insist the level indicator system be repaired or replaced. The problem can be as simple as fine-tuning the present system. Some have an adjustment pot on the back of the monitor panel for each tank.