I recently purchased a used Cornelius "Pepsi" style cooler, with the 2 sliding glass doors on the front. It is one of the big 7 foot tall units with all of the refrigerant motors and such on the top. The cooler sits in my basement in a temperature controlled room.

My question concerns power to the cooler. I would like to use an external temperature controller (Johnson Controls) with it. It has a temp probe that goes into the cooler and basicly shuts off power when you get to the temperature that you want, and turns it back on when you get to the temperature offset. It turns power on/off to the whole cooler. Will this type of setup shorten the life of the cooler/compressor?

I don't aim for super cool temperatures. It would normally be set for around 40F. I wouldn't open the doors very frequently to let the cool air out. Hopefully it would cool to the desired temperature, and hold it for a while before needing to cool again. It is destined to be a beer kegerator.

What do you think?