Lennox 81W03 Control Board

Lennox 81W03 Ignition Control Board. Lennox 81W03 is the OEM replacement of Lennox 17W70 control board. This control board is the brain of your Lennox unit. It controls all the functions of your unit and gathers data from other control components to decide how your unit performs so it is important to confirm all other control components is working properly before deciding the control board is bad. Factory OEM part means this board is exactly the same as what factory put in the new units. All boards are tested before shipping out from factory. Replaces: 17W70, 17W7001, 81W0301