Originally Posted by golfguy819
Just checked the OFS and it's set at 0. Since I didn't have anything in it yet, I had the probe just hanging inside. When I came home this morning and looked at it again, it was really close to the side wall and was probably getting an inaccurate reading. So I put a corny keg in and ran the wire through one of the handles so it'd hang more towards the middle. After that, compressor kicked back on at 68 and chilled down to 62 before it cut off. It does hold temps for a long time though before it rises back to 68.
Well no wonder.
Air temp fluctuates too readily, and by having the probe just free hanging in the air, you are going to have huge swings.
Fill that same corny keg with water, put the probe on the side of the keg, cover it with something insulative (a piece of foam, a folded up hand towel, etc, and tape it down to the keg wall with duct tape. After water in the keg gets down to temperature, I'm willing to bet your temp swings will be much smaller due to what you are measuring actually having thermal mass.
This is how you should situate the probe with kegs or fermenters. Thermowells work nicely too for fermenters.
Sent from my iPad using Home Brew