It's back up mate, sorry about that

@Hondacity,

I did a run of prime95 yesterday for you, but even after reseating the block several times, I was unable to stop the thermal cut off kicking in, so the highest temp that I could detect on the outside of the radiator was 35c. In my opinion, it's the base that's the main problem with this particular unit, but I've also noticed that the pump ticks for a while after turning it on, so maybe there's air in there too.