All three tanks won't empty.

[Cincinnati Kid]

All three of my waste tanks drain quickly with the sanicon, but they all stop draining at an indicated 1/3 full level. It can run for a long time and never get more than 2/3 out of the tanks.
I've filled the tanks with clear water and flushed them out several times, and ran the black tank flush for a long time, too.

Any Ideas? It drained fine for 2 weeks, but not now.

[oldmanAZ]

It's probably the tank sensors. When they get 'stuff' on them, they fail to show the actual liquid levels.

[Cincinnati Kid]

Originally Posted by oldmanAZ

It's probably the tank sensors. When they get 'stuff' on them, they fail to show the actual liquid levels.

I hope that's all it is. But all three at the same time?

[albirk]

I have never watched the tank sensors. When it quits draining out the hose the tank is empty.

[DonaandDon]

X2 on albirk.

[AKRUEBBE]

Originally Posted by Cincinnati Kid

All three of my waste tanks drain quickly with the sanicon, but they all stop draining at an indicated 1/3 full level. It can run for a long time and never get more than 2/3 out of the tanks.
I've filled the tanks with clear water and flushed them out several times, and ran the black tank flush for a long time, too.

Any Ideas? It drained fine for 2 weeks, but not now.

Mine is the same way............after emptying the tanks completely, the indicator always shows 1/3 full..............relax, all is fine