Tunze nano ATO issue

[Jhillreef]

It keeps filling over the sensor. It should stop. It fills until it’s completely covered. Anyone else have issues ?

 

[curtisbenm]

Check your float switch. May have a pest snail or algae buildup around the assembly. I had a baby snail get wedged in mine last month. Thank goodness I built my sump to hold it. But if my power went out, and pumps died, I'd have a flood

 

[lapin]

A couple of thoughts
Is the sensor stuck?
Is it over filling while the pump is in priming mode (1.8 min)?
Try un-pluging the sensor and re-plugging it back in.

 

[Jhillreef]

It don’t overfill a lot. But it will cover the sensor then stop. Like the whole piece is submerged... it just overfills whenever it feels it needs water. I just thought it’s supposed to hit that float switch and stop not cover it all

 

[Montiman]

It should not be fully submerged but it will be partially covered

 

[Jhillreef]

Yeah it’s fully submerged

 

[Blue Ring Octopus]

How thick is the glass where the float switch is attached. If it is too thin the magnet is too strong, so you may need to add a spacer.