50A55-743 Emerson Single-Stage HSI Integrated Furnace Control Board Kit (OEM Replacement for White-Rodgers and Goodman Controls) Model: 50A55-743 Replace the Original with the Original! Replaces White-Rodgers 50T55-289 and 50A55-289 Replaces Virtually All Goodman Single-Stage HSI Controls with 120V Ignitors The 50A55 Simplifies Installation and Ensures Peak System Performance Includes Ignition Control Module, Installation Instructions and OEM Cross-Reference