Still not working correctly. They put in a 15 second delay to start the fan…so after 15 seconds, the tstat starts the fan, then the furnace control board shuts it off a few seconds later, and then starts the fan at the appropriate time, once it’s up to temp.
15 seconds isn’t enough time. 90 seconds maybe. Or what it should really do is leave the fan control up to the furnace in this case.