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Coral Vue Hydros

Tunze 3152 pump acting up..help?


Jimmeh Lee

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Hey guys, long time no see! I've had my 3152 top off set up and running since I started my Fusion 10 back in February/March, and it's worked perfectly up until now. When it switches on, it will make this knocking noise, and the impeller just shifts back and forth. I've seen this happen on my freshwater tanks with the aquaclear filter's impellers, but giving them a tap would fix the issue. So far I've tried that, shaking the pump, filling the top off reservoir, and making sure there were no air bubbles in the pump. The only thing that's worked is unplugging it and plugging it back in a few times, but then it will only actually work the first and time it runs.

I'm helpless over here. lol

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Hey guys, long time no see! I've had my 3152 top off set up and running since I started my Fusion 10 back in February/March, and it's worked perfectly up until now. When it switches on, it will make this knocking noise, and the impeller just shifts back and forth. I've seen this happen on my freshwater tanks with the aquaclear filter's impellers, but giving them a tap would fix the issue. So far I've tried that, shaking the pump, filling the top off reservoir, and making sure there were no air bubbles in the pump. The only thing that's worked is unplugging it and plugging it back in a few times, but then it will only actually work the first and time it runs.

I'm helpless over here. lol

I had a tunze nano and had the same problems. The knocking noise is actually the "alarm" that the pump ran for longer than the allotted time. I contacted tunze and we tried trouble-shooting with new pumps (they sent me three, all had the same issue) and finally they sent me a new sensor and it worked like a charm. I'd reach out to Roger at tunze and tell him what's going on. Your ATO should still be under warranty.

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Thank you very much! I'll have to clean up the sensor very well before reaching out.

It might be that that is not it! But that clicking noise is definitely the pump saying "no more water is allowed to go through" ;)

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