I tried that with auto setting, and that didn't work. It only moved the fan when i cranked the heat up (higher than room temp) I never tried with ON all the time (at least that i can remember as i was switching it back and forth). I'll give that a try, though it would be nice to have it to kick in in auto mode, but i'll take what i can get.
Will let you know tonight
It needs to be ON, Auto will not let the fan only run, the way it is wired.
If you want the T-Stat to control the blower only when calling for cooling then it will need to be rewired, from the norm.