ICM272C Carrier OEM replacement circuit control board for circulating fans in air conditioning units, heat pumps and forced-air systems. Dual function fan delay timer. OFF delay purges ducts of residual air. ON delay allows air to reach the proper comfort level prior to energizing fan. 10-30VAC input voltage. EM Replacement for Carrier HK61GA001, HK61GA003 and Texas Instruments 2FD-1. Photo may not be of actual board.