The ICM2820 furnace control board will control the functions of the furnace including the induced draft blower, circulator blower, gas valve, ignitor, and flame sensor based on inputs from a thermostat and various sensors in the furnace. The ICM2820 control will also detect faults and communicate the faults while in service and display the faults through its on-board LED as well as employ a timed safety lock-out when the conditions warrant.