My freezer controller, for my homebrew beer keg fridge (chest freezer used as a fridge), crapped itself the other day, so went looking online for another better quality one. Found a post in a homebrew forum about fridge/freezer thermostats, that showed that you could use the internal freezer thermostat, and adjust the course temp control screw. I didn't think the freezer t'stats could go high enough, but happily I was proven wrong.
Adjusted the course control on mine, and now I can have chilled beer with no external control, from a chest freezer. Beer now pouring at 3degC from adjusted original thermostat. Would pour a bit lower if I poured more than one glass, because the font/tap warms it up a tad, as it passes through.
Biggest problem is, after two days checking temps every 30 mins, and fine tuning, and testing poured beer temps, I'm a bit sloshed... well I wasn't pouring it down the sink... Burrrrrrp..
Buuuuuuurrrrrrrrpppp...