We'd had the same thing happen last year. First trip out this year, we used four 1-gallon bags of ice cubes (from home icemaker) and added them to the black tank (via potty) for our 6+ hour drive.
Apparently there was 'stuff' dried onto sensors and the ice and its melted counterpart, along with the sloshing of the drive, cleaned off the sensors. No problem since!
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NanaKaren
Karen Elling
2012 Rockwood Mini Lite 2109S
Useta have a 17 ft Casita LD twin bed mod &
Coleman pop up
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