Originally Posted by Jsamp
Would one of those round dimmer switches for lighting work? I know you have to have a little trial and error with a thermometer but once you found the sweet spot you could mark it on the dial so you know where to always turn it. I have a portable refrigerator and all the stuff to follow that guide without spending money. Just curious because I'm assuming all your changing is the voltage levels to the appliance.
No. Wrong. The Johnson regulators cycle the appliance compressor on/off. Do NOT try using a dimmer.
The johnson controllers work perfectly, and can be had on ebay (unwired) for ~$25 or prewired from online brew supply shops for ~$50.