FrustratedUser

[sOLVED] OK, last update. Swapped another SATA cable to power the pump and now on system start up have a color cycling pump / water block. Yay! Not sure whether it was the connection to the power supply or the previous cables. either way working great now. I didn't think it was a power issue given when I unplugged the previous SATA power cables the light would go off. Thanks for the responses.

Just took delivery of a replacement from Amazon, facing the exact same issue. Fast flashing red on system start up. Again this is with the cooler off to the side so I don't overheat and burn out my CPU power cycling it a dozen times troubleshooting. Everything is plugged in per the manual, except for the lead to the CPU fan header. It's plugged into the AIO header pin, that is configured in the BIOS to run the AIO header on DC mode at full power. Also the iCUE software shows 0 fan rpm, and 0 pump rpm with all set on extreme mode. Having called Corsair support and them concluding the previous system was defective, I have nothing else to go on here. I even replaced the SATA power cable to the power supply, with no different results.

Ok, so after cooling myself down having wasted nearly my entire day trying to troubleshoot this thing. With the stock cooler reinstalled, I'm able to preinstall the iCUE software. What I did next was take the H150 back out of the box, I was preparing to ship back to Amazon and plugged it back into power, the AIO PUMP header on the motherboard, the fans it came with, and the USB header on the MOBO. Rebooting, the iCUE detects the H150 however oddly shows 0rpm fan speed and 0rpm pump speed even when seemingly setting them all into whatever "EXTREME" mode means. Is this thing just defective? EDIT: The stock cooler and fan are still on top of the CPU, so that I can actually boot up my PC and run the iCUE software.

Yes it does throw a CPU fan error. Not sure why Corsair or we should expect any different when a single pin wire is on the header. I'm not able to have the system stay powered up for more than 5 seconds into seeing the BIOS screen due to thermal shutdown, so iCUE software or Windows details are irrelevant at this point. Imagining I'd have enough time to open a browser, go download software, install it, run it to look for temps is unfathomable. Apart from being in Windows running the iCUE software is there any way to know with certainty that the pump is even running? The fans from the system run, so there's clearly power going through the things. I was flummoxed talking to the Corsair support that flashing red on boot isn't a known indicator of one or more specific issues to diagnose. Of course I'm assuming a never ending flashing red on boot is indicative of something not being right, along with BIOS reporting CPU temp going atmospheric in 10 seconds of course.

So just finished a 90min call with Corsair tech support (I know don't ask). Problem goes unresolved. Cooler LED just flashes red no matter what I try. Unit is obviously getting SATA power as fans spin, led flashes red. Only thing I'm unsure of it the 3pin CPU fan connector interfacing with only 4pin headers. Specifically only the CPU Fan In pin only. Have read all about the ASUS QFan control BIOS options and tried PWM, DC, Auto, full speed, etc to no avail. LED just constantly flashes red and I assume pump never starts given when on the CPU it immediately overheats and the system turns itself off. Tech support refused to troubleshoot further because I refused to constantly let my CPU get to 100c before turning off with it sitting on top of the CPU. Would love an AIO solution that worked, and had assumed Corsair's product was the go to best of the best. Don't want to just refund through Amazon, but also don't want a replacement if I have to go through all the headache of having to troubleshoot it all over again.