I dont pay attention to them too much, unless we dont have a lot going on and im trying to find something to fix.
But when i get a stuck black tank light what i do, since our "outdoor shower" is in the same wet cabinet as the black tank flush, i dump the tank, pour dishwasher liquid down the toilet, then use the outdoor shower garden hose to the black tank flush inlet and add 10 gallons of hot water to the black tank, then take it for a long bumpy ride to the next place we are calling home.
That usually does the trick,
If not grab a beer and a fishin pole and forget about it
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