Originally Posted by djbradle
Mine is an upright freezer so how can heat possibly be used? It contains r134 in all the evaporator coils and compressor. I rather just get the johnson for this purpose. No lamp either and an analog thermostat with thermocouple.
You could put a small screw-bulb fixture in, with an aluminum paint can around the bulb, or use one of the ceramic reptile heat bulbs.
Just because its capable of controlling a heater as well as a refrigerator, doesn't mean you have to use it. You can just use it to control the freezer cooling temperature.
They are cheap and easy to set up. I bought one of these and am going to use it on the ferm chamber I'm building from a dorm fridge.