Tunze 3152 Nano ATO problem-Maybe Pump??

[ReeferMadness80G]

So for a few months now, I'll come home to my tank spitting bubbles, uh oh ATO failed, sure enough the return chamber will almost be empty with a full RO reservoir! I'll unplug and plug it back in and the pump turns on and pumps water for about 1 second, and then shuts off, I have to keep unplugging it and then plugging it back in for it to run 1 second until it's raised the float sensor to the normal water height. Sometimes it will operate correctly after I unplug and plug it back in but it always fails after that. Also, I should say, I can pull the pump out of water and run dry and it will run for 1:30 minutes but as soon as I put it back in water, back to running for 1 second only. Is this a pump issue or controller issue? I don't have my receipt anymore so idk if tunze can help me, the ATO is about a year old. @rvitko what's your opinion? If anyone else had this problem can you tell me if replacing the pump would work?

 

[ReeferMadness80G]

#mods I don't know why this went to "Aquarium Reef Keepers of Southern Connecticut" but I was trying to put it in General Hardware, Equipment etc. Can you move please? @melypr1985

 

[hybridazn]

Moved

 

[hybridazn]

Have you checked the line to make sure it isn't clogged? Also is the pump clean?

 

[ReeferMadness80G]

Have you checked the line to make sure it isn't clogged? Also is the pump clean?

Thanks! Yeah, it's all clean and the line isn't clogged

 

[AdamNC]

Trapped air bubbles inside the pump?

 

[ReeferMadness80G]

I shook it out and ran it upside down under water, to check for that. I ordered a replacement pump. I will update this thread once it gets here

 

[ReeferMadness80G]

Ok so the replacement pump seemed to fix the problem, so anyone with this problem, go ahead and buy the 20 dollar replacement pump, it works!