ICM Controls ICM289 Furnace Control Replacement for Lennox Control Boards, Replaces all BCC1, BCC2 and BCC3 Circuit Boards Low cost form, fit and functional replacement board for Lennox BCC1, BCC2 and BCC3 circuit boards Controls inducer fan motor, blower fan and monitors limit switches Microprocessor-based design Functions with all 24 VAC thermostats