The GC4 has been through priming but this is the first time I'm trying to use it in anger. I've connected everything up to port 1 on the GC4. The power cable is connected to the GC4 and the fermenter. I upgraded the controller on the fermenter already thinking that was the problem. So, now I'm running the Conical Fermenter Pro Connect (which has power and seems to be operating normally). The GC4 is cooling itself to about 22-23F and cycles normally. No alarms or other indications anything is wrong. The Fermenter is displaying that it is cooling, but nothing is happening. Anyone have any ideas? I've written to Grainfather support, but it will be a while until they are awake in Kiwi land.