This board replaces Norcold part numbers 621267001, 621268001, 621269001, 621270001, 621271001, and works with the original control panels. For all 2-way and 3-way models: N410, N412, N510, N512, N621, N623, N624, N640, N641, N821, N822, N823, N824, N842, N843, N1095, 1200LR, 1201LR.
