My regular thermostat has died and I知 getting ready to install a digital one (Inkbird type from Amazon). I currently use one of these to control my spillover fan for the refrigerator
temp. The output sends 12v.
My question is that I知 unsure of which way to hook it up. I have a Cool Blue system. I can see 3 options for hooking it up. 1) simply use this instead of my off/on switch; 2) hook this up with a relay to turn the unit off/on through the off/on switch; or 3) use the relay to turn a switch off/on that connects to the t-stat connection.
Currently I have an off/on switch connected to the t-stat connection, simply making continuity. It works fine except I have to manually turn it off/on and I only guess when to do that.
I知 leaning towards 3. But I知 wondering if the small mvolt that the relay sends will damage the control unit where the t-stat connection is.