Resolved Black tank yellow light coming on way too early

[Neal]

I think the lesson learned for me as a non-fulltimer is to rethink my storage setup. I typically empty black and gray tanks for storage. It may be a better decision to have water/cleaner in the black tank to at least the 2/3rd level while in storage. Something mild such as dawn but an empty black may not be a good thing for non use.

 

[AbdRahim]

I always clean tanks, rinse and empty, for storage.

 

[Richpatty]

I found the simple step of leaving around 3-5 gallons of clean water sloshing around when you are driving keeps things pretty clean. I have never had a problem with my sensors as long as clean water is left in there. This was even true of my old Thor gasser I had for 10 years....

 

[Stuart W]

Look to see if the oem sensor strip is peeling off. This was my issue, but I was fortunate to have newmar replace it with the pressure sensor version that is flawless. This is what they look like

The 23 DS now uses pressure sensors

 

[JRS]

Another product to consider is: Holding Tank Cleaner
Must be gaining in popularity since they're currently sold out.
A well experienced full timer recommended this and said it's an amazing product. Haven't had to use it yet.
I had issues with our old system until the Mother Ship switched me to the pressure sensor.

 

[Rich W.]

I just use lots of water. Just got back from a month with perfect black tank system performance on “wet bowl”. Put it on dry bowl for the ride home, and once again, the amber light was still on after dumping tanks. One flushing with a full tank of mostly water and it will be back to normal. Doesn't really matter though because the toilet will keep flushing until the full sensor is activated and the red LED is on, and the premature amber wont make that happen any earlier.

 

[Rich W.]

The 23 DS now uses pressure sensors

This seems like a much better system.