Setting up a Thermostat

[tttaylorrr]

Also, I've never actually heard of the foil messing with the probe, and come to think of it all my UTH's are covered in tin foil with the probe on top of them. Is that a real thing?

i don't think so. the only thing close to that is never taping over the probe head with any type of tape; that will definitely create misreadings.