I can see the pump moving, so that seems ok. I drained and flushed it, there was no blockage.
I don't think the cooling plate is clogged because the temperature of the water is rising in the tube.
Going to give it one last try, Amazon have accepted it as a return so I'm just curious as to what the problem is. I've ordered an x73 kraken.
Seriously though, AIO coolers are trash. I've never had one last a year. Tried Corsair, cooler master and alphacool. All failed before 12 months. Reason I got the alphacool AIO was because I thought they'd be good quality due to them being a water cooling company, what a mistake.
The only one I had any luck with is the old swiftech 280mm Cooler in my son's PC, that has the pump on the radiator.
I should buy a cheap air cooler to use when they inevitably fail.