Review on 🌡️ High Accuracy Electronic Thermostat Controller - DROK DC 6-30V 24V Digital Temperature Control Board: -50 to +110 Degree Celsius, LCD Digital Micro Temp Control Switch Module with Waterproof Sensor Probe by Mark Morrow

It needs a simpler language to describe the connection lover and describe the main functions. This is a relay switch: Heat - Normally Closed Cool - Normally Open During the cooling cycle the temperature rises to the set level required to turn on. Example - if C34 is set, up to what temperature should it be cooled? If 35 degrees Celsius is desired, set the range (top of screen) to 1.0. The device turns on at 35 and then turns off when it cools down to 34. Also, if you're using a low voltage chart or device power (the amount of voltage supplied to the device) or say 24 volts, you need the positive end of the load connected to the positive input. And I connected the minus to the 4th terminal. And to the middle 2 terminals you need to connect a jumper. You can see the green sweater in my photo. The only negative (this is a black and partly red wire) appears on the 4th connector. Don't confuse this with positive.