Carrier Bryant LH33WP002A Ignition System Control Printed Circuit Board

The Carrier Bryant LH33WP002A Ignition System Control Printed Circuit Board is a 24 VAC electronic ignition control module that orchestrates burner ignition sequences, flame proving, blower operation, and safety shutdown in gas-fired heating equipment. Designed for use in Carrier and Bryant gas furnaces, rooftop units, and commercial heating systems, it provides integrated flame sensing, lockout protection, fault monitoring, and outputs to the ignitor, gas valve, blower, and safety circuits. Key specifications include manufacturer part number LH33WP002A, 60 Hz operation, and PCB-based construction with mounting suitable for control panels or furnace compartments. Common replacements for this board include Carrier HH84AA021 Ignition Control Board, Carrier CESO110057 Ignition Control Board, and Bryant LH33WP003 Ignition Control Board.