I have a Carrier furnace and central air conditioner system. Last winter I replaced the controller board with a ICM281 board. Heat works great. Now this summer we want to turn on the AC and we don't get any cold air in the house because the blower doesn't turn on. I have verified that the AC unit is turning on. Also, the blower still comes on when set to heat at the thermostat. What am I missing to get the AC blower to kick on?