Is D44 (yellow) also lit next to D45(red)? Did you ever fix your problem? see my latest comment what Cointerra told me, it might fix your problem!

No I did not get a better hash rate. The terraminers are designed to run at 1.6Ths regardless of temp until a core hits 120c then it reboots. I also noticed my miners would have one or two cores that where significantly hotter then the rest. I opened my last 3rd machine to cool it and noticed that many of the screws that hold down the cooling block where not even screwed in or they where barley screwed in leaving the cooling block lifted up and not having good contact to the core. Another fail by cointerra. Only apply the LiquidPro to the cores, not the cooling block. Just like the photos I posted.

FYI, my third machine when put back and turned on failed to boot up CTA1. Ive cleaned the board twice but still no mining. It has power but does not boot up and coming online so currently only CTA0 is mining. I will most likely pull this board again and give it a full bath in a last desperate attempt. I was so critical in doing this last cooling job just because of my previous experiences and still I fucked up with no idea how.

If you decide to open clean and cool with LiquidPro its a huge risk but if you can pull it off its well worth it

I have applied thermal compound about 5 times so far with different results each time. If you don't get enough paste on them they will get hot and to much and they get hot. If the chips get to hot they are going to shut down. So the board you have that's down could be from the chips getting to hot. Reason I say that is one time after I reapplied the paste I had a chip shut down as soon as the stats came up from getting to hot. I redid the paste once again and it came back. Finding the right amount of paste is the trick since the four die's are not level. I'm yet to get it right.

I thought I'd share my experience troubleshooting a very hot miner. Although temperamentally slowing down, this miner would perform at 100% after a reset, usually staying there for a day or so. I thought I'd replace the thermal paste with some arctic silver to see if it brought down the temperatures from ~90C. Long story short, it did not. Now one board isn't responding, and the other has overheating problems. Disregarding my extreme stupidity, it was a valuable education in the unit's operation. Here's a video I shot of it in operation:

https://www.youtube.com/watch?v=7nqr9Dsli24

Note the orange and red status lights on each board. I'm assuming those are individual core hashing status. The "bad" board (on the left) would simply flash the orange lights as shown in the video, then reset itself (the fans go to maximum briefly then reduce in speed).

It would be really nice if they released the source code for the firmware used in the TI microcontroller they're using. I'm guessing they don't because yahoos like me would change some setting that would definitely fry the chips or electronics unintentionally. I don't blame them, but still want it. What the device does can be partly ascertained from the cgminer source code, but all that is pretty high level message passing which mainly involves reporting of values, and not setting of them.