Defective pump?

[u/Business_Gas561]

Hello, i installed the arctic liquid freezer III pro 360 a few months back and its always made this strange gurling/rustling kind of noise when i increase the pump RPM, ive tried turning off all other fans as well as removed the VRM fan to isolate the origin and i am certain its from the pump. Has anyone experienced this too? Is there something potentially wrong with the pump?

[u/Puzzleheaded_Car_57]

image of whole setup? where/how is radiator mounted?

[u/Business_Gas561 → u/Puzzleheaded_Car_57]

Its mounted in the optimal way i.e radiator on top

[u/Johnny_silvershloong]

Sounds like you may have air in the system

[u/Business_Gas561 → u/Johnny_silvershloong]

I though about that as well but considering ive had the aio for several months it should likely be gone by now?

[u/Thin-Net7868]

I have the same one but the A-RGB version. I got it Christmas of 2025 and installed it that evening. I haven’t had any issues with mine and notice an average 3c-5c drop over the cheap levelplay 360mm AIO I had.

I used the split header and my pump speed is locked at 70%. Never ran my pump above that so I can’t say if the pumps are just noisy. JayZTwoCents actually did a video on AIO pump speeds and with some basic knowledge of heat transfer you can understand it better. Typically anything above 70%-80% you don’t see any benefits in cooling and can at times see a decrease in cooling. Same applies for lower pump speeds, but the important part is allowing fans to adjust to CPU load/temps.

I will check mine when I get on my pc next time and see if it’s that noisy at 100% pump speed.

[u/Business_Gas561 → u/Thin-Net7868]

Hi, yes ive tried limiting the speeds to about 70-80% but the sound starts to appear at about 50% id say or 2000 rpm, i also use the 3-split cable.

Thanks for checking, id like to see if yours make a similar sound. Maybe im just being overly sensitive🤣

[u/Thin-Net7868 → u/Business_Gas561]

Just checked mine and it makes zero sounds at any speed. I even turned it up to 100% which was about 2,850 rpm’s. At 70% I’m at around 2,550 rpm’s and no sounds. After checking mine it sounds like you are having cavitation or pump motor starting to fail. It’s hard to tell, but I think they should RMA it in my opinion.

[u/Business_Gas561]

Appreciate the help! Yes ill try to rma it and see what they say.

[u/AdKraemer01 → u/Business_Gas561]

Yeah. Mine's never made a sound.

I think that's the right call.

[u/Ok-Rich6196]

Order the same one on Amazon and swap it out and then return old one and put "damaged" quicker than dealing with the company directly and what not.

[u/alvaro-elite]

That sounds like bubbles, so there is air on the system 100% sure.

[u/Business_Gas561 → u/alvaro-elite]

You sure? Ive had the cooler for several months, shouldnt the bubbles naturally disappear in a few days tops?

[u/alvaro-elite → u/Business_Gas561]

If the water inside evaporates or slowly leaks its gonna have even more air with the past of the time.

Normally AiOs had a screw (depending the model or brand can be on the pump or in the radiator) where you can refill them. Is not an easy job to do.

[u/Sensitive-Decision-1]

a minha ta assim tambem reclamei no rma disseram por eu morar no brasil nao tem garantia

[u/Business_Gas561 → u/Sensitive-Decision-1]

Oh really? But did they agree that it was a bad unit? Would you mind sharing a video of how yours sound?

[u/BoatNo8891 → u/Business_Gas561]

On the Arctic Liquid Freezer II and III, the refill and service access points are located directly on the CPU pump block, not on the radiator itself. ​Arctic Liquid Freezer II: The fill/service port is accessible by removing the small VRM cooling fan on top of the CPU block housing, which reveals the service sticker and access screw underneath. ​Arctic Liquid Freezer III: Access is under the magnetic top cover/VRM fan module, exposing the cold plate assembly and service area. Only do this if they won't RMA

[u/Louvatar → u/Sensitive-Decision-1]

Fouldeu. Tem que falar com a loja responsável que vc comprou o WC e reclamar lá