So recently I bought a H60 Corsair AIO for my prebuilt cyberpowerpc and after installing it the first time, it worked great, never had any issues but then I booted it up today and it’s idling the cpu at 179 f to 190 f and I can’t figure out what’s wrong
You need to determine if indeed the pump is no lomger functional as sometimes debry is the culprit or it's orientation has developed air bubles.
There should be a slight hum from the pump if it's OK.
Check all cabling and connections to both fan headers and power connections.
If you suspect the AIO is defective then RMA.
What CPU are you trying to cool ?
Have you Overclocked the CPU ?