HK42FZ057 Circuit board for carrier and other air handlers (furnace). Bought it new to repair my furnace. The motor was the issue, not the board. Works on these models and more gas furnaces (per my research, verify compatibility). Carrier, Bryant, Payne, and more. 59MN7A060V171214 59MN7A060V211220 59MN7A080V171214 59MN7A080V211220 59MN7A100V211222 59MN7A120V241222 987MA42060V17A-B 987MA42080V17A-B 987MA60060V21A-B 987MA60080V21A-B 987MA66100V21A-B 987MA66120V24A-B.