When I used to brew my own lagers, I used a mini dorm fridge for lagering. Ideal temp for lagering is ~45 F, but fridges use timers now instead of thermostats. temp was always too low. So, I used an external appliance timer to shut power on and off to the fridge. I just set the fridge to the coldest setting, and fiddled with the external timer until inside temp was ~40 - 50 F and made the best lagers on the planet.
You could probably use one of those timers for a crock pot, too.
You could probably use one of those timers for a crock pot, too.
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