Hi all, As I mentioned in the title, I have a serious problem with the tc feature of a ThinkVape Box 75 device. The mod was first used 4 days ago, and was working fine for 2 days. Then after a battery change and an atomizer fill the temp was way off. Altough it was set for 210 Celsius, and was working like a charm in the first two days, now the temp did not go even close to the set value. After a lot of troubleshooting trys we discovered that although the mod measures and work accurately, the "temp sensing" looks like to start form the ambient minimum. Ohm measurement, volts and watts are accurate, the mod works flawlesly in vw mod, but because of this wrong tc, it is useless as a tc mod. I tryed everything I can think of, threads were cleaned, atomizer cleaned and rebuilt. I have rebooted the device, restored factoy default, even tryed an earlier fw version, but none of these worked. I attach three pics. On the first you can see the setup, room and board temp, and that the temp is not going close to the set 195 celsius. On the second you can see the setup, and the dotts show when I pulse-fired the device. It show -27 celsius, that is why I guess it starts the temp from the ambient minimum (shown on pic 3) and not from room temp. As I was saying at the beginning, I noticed this after a battery change and tank refill. I did inserted the battery correctly and I did not flood the tank (expromizer 2.0) nor poored juice on the mod. Since that it is doing with all my attys, no matter what resistance wire they have. I seriously need help please, I have no idea how this bug came to be after 2 days of use.