I've used a wine fridge before and a chest freezer on on a Herpstat thermostat. I had the freezer outside over the winter with heat rope in the bottom and the weather was 95 F in December.... soooo I had to plug the freezer into the thermostat too! Worked great! Freezer set to 57, heater set to 50. My temps were 55 most of the winter.
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