903404 - M1 Combustion Blower AssemblyNordyne 903404 M1 Combustion Blower Assembly Found in both M1 and MG furnaces, this combustion blower is a unit used in heating, ventilating and air conditioning equipment by allowing air to travel to the combustion to help the furnace run better. Used With M1GB 077A AW M1GB 077A BW M1GB 090A AW M1GB 090A BW M1GC 077A AW M1GC 077A BW M1GC 090A AW M1GC 090A BW M1GD 077A BW M1GD 090A BW M1GH 077A AW M1GH 077A BW M1GH 090A AW M1GH 090A BW M1MA 056A AW