wondering when the fan should be kicking on, does the fan run in all three
modes?

it was hot here in the shade 75-80? and it never kicked on

it worked before i replaced it, and i tested the new one from gowesty, i
hooked 12volts before install in would run both ways. the gowesty fan did
not come with wiring instructions

I did not bench test the t-stat switch, didn't have a heat gun at the time

the frig will only chill 20 degrees difference between outside and inside
of frig on 110volt

i'm letting it run tonight on propane to see what it does temp wise