So I just built myself a fermentation chamber and used the aquarium temp controller STC-1000 that many others have used and seen here
anyway it seems to be working to a point but I'm not sure if I wired it wrong or just don't understand the operating procedure.
I only have a heat source at this point (light bulb), there is no cold yet and nothing plugged into the cold outlet. It works and heats up the chamber to the specified temp but then the controller switches from heat to cool function and keeps the heat source turned on, heating the chamber past the desired temp.
Any ideas? I just started a batch of cider and need to get this dialed pronto.