The Trane CNT5133 single-stage ignition control board Trane or American Standard gas heating systems. This board is responsible for the safe and proper lighting of the furnace in this place. During the heating cycles, this initiates the gas burner ignition sequence through the use of direct spark technology. The control board fires the igniter electrode with a high-voltage spark once ... https://www.partshnc.com/trane-cnt5133-1stg-ignition-control-board