Yes, I use mine like this, although both cooling and heating are wired I only use the heat side and ambient temperature for cooling at the moment.
So cooling switches on when required but there is no device attached.
I would have thought though that if you do have a fridge you would still want it attached so as to have it running heat or cool cycles as required, with some adjustment of the Fridges thermostat.
hi thanks, i have 2 fridges in the shed, they are set at there warmest temp
8 degrees, but the temps are 3 degrees, so need to heat the beer up.
ive also looked at the plug and play Inkbird ITC 308,
If you want the fridges on then you need to use the stc-1000 to control both the fridge and the heater, otherwise you will be heating up with the heater and cooling down with the fridge at the same time.