Ok, so I bought a Kenmore Chest freezer along with a Ranco Single stage Temp Control. I plugged everything in and when I set the temp to 65, along with setting it on the cool setting, the probe is holding at 61 degrees. When I set it to Heat setting, the freezer still wants to cool down. What am I doing wrong? Do I need another piece of equipment? I'm getting ready to brew and I need my fermenter to be around 70 to 75. My understanding was all I needed was to by the temp controller, plug it in like I did and I would be all good. But it doesnt seem the case. Any help would be appreciated. Thanks in advance.