Its temperature controller. If you have the glycol temp set to 68 it’s going to take forever to lower the fermenter temp. Change the temp controller setting for glycol lower!What is TC? I have the temp on the fermenter at 68 as target. But it never reached. However, the chiller is now at 68. It is running pretty good now. But fermenter temp has six more degrees. Will the target temp tell the chiller to turn on? It stopped again. Its temp is 66 degrees. But fermenter 77.3. It seems to be coming down. How long does the tank last? It seems that it didnt last at all.