why did you de-ariation cycle, (pump timed to run for 30s on and 30s off for 8 hours) ?
Is this how it should be done ? Sorry for the stupid question, is my first watercooling project.
Is the problem that the heatsink cant handle 2 boards on it? If you use only 1 board on each heatsink would it make it work ?
EDIT: Sorry I read your post again..... so the heatsink is cool.... its just the sensor that actualy reporting false temp making it to shutdown?