Tunze 3155 ATO Overfilling

[BringingThatDottyback]

Have a used Tunze ATO system that has been running fine for last 2 months no issues. Yesterday it overfilled to the point that the emergency float switch was activated. I turned it on and off and it seemed normal so I treated it as a one off and left it plugged in. Today while in kitchen making lunch I heard the pump activate 3 times in the span of maybe 10-15 minutes. But when I checked water line seemed maybe a hair or two over normal water line.

Just checked after dinner and it is probably 3/4 of an inch above the normal water level in sump. Googling it seems like people have these issues when the optical sensor is dirty but I checked and there doesn't seem to be anything on it. Does anybody have any other possible solutions or should I just acccept that a 20 dollar ATO system was to good to be true and buy a new Tunze?

 

[Vested]

If you got it for $20 somethings sketchy lol, believe the full size 3155 is near $200. Which it is worth it! Get the full size one if you can find it in stock

 

[Pistondog]

Have a used Tunze ATO system that has been running fine for last 2 months no issues. Yesterday it overfilled to the point that the emergency float switch was activated. I turned it on and off and it seemed normal so I treated it as a one off and left it plugged in. Today while in kitchen making lunch I heard the pump activate 3 times in the span of maybe 10-15 minutes. But when I checked water line seemed maybe a hair or two over normal water line.

Just checked after dinner and it is probably 3/4 of an inch above the normal water level in sump. Googling it seems like people have these issues when the optical sensor is dirty but I checked and there doesn't seem to be anything on it. Does anybody have any other possible solutions or should I just acccept that a 20 dollar ATO system was to good to be true and buy a new Tunze?

Soak in vinegar to clean for a few hours. Try to place it in a micro bubble free zone. After cleaning, it might act up for several days until it re establishes bacterial slime coat.

 

[piranhaman00]

Wipe the sensor with paper towel

 

[muzikalmatt]

Soak in vinegar to clean for a few hours. Try to place it in a micro bubble free zone. After cleaning, it might act up for several days until it re establishes bacterial slime coat.

This. The optical sensor occasionally needs cleaning. I had a similar issue on mine and once I cleaned it it's been working solid as a rock.

 

[BringingThatDottyback]

If you got it for $20 somethings sketchy lol, believe the full size 3155 is near $200. Which it is worth it! Get the full size one if you can find it in stock

Haha I found it at a garage sale, I think the woman was selling a relatives aquarium stuff because it was mixed in a bag with a bunch of random old pumps and wires. I thought it was a steal at the time because all I needed to do to make it work was buy a new pump.

 

[Vested]

Haha I found it at a garage sale, I think the woman was selling a relatives aquarium stuff because it was mixed in a bag with a bunch of random old pumps and wires. I thought it was a steal at the time because all I needed to do to make it work was buy a new pump.

Ahh thats a great find lol