121-446

This advanced Modulating Direct Spark Ignition (DSI) Control Board is a critical electronic component designed for high-efficiency gas furnaces and HVAC heating systems. As the primary brain of the heating unit, this circuit board manages the ignition sequence, monitors flame safety, and precisely regulates the modulating gas valve to ensure optimal temperature consistency and energy efficiency. It is an essential replacement part if your furnace is failing to ignite, experiencing irregular heating cycles, or showing signs of control module failure. Engineered for reliability, this board provides the sophisticated logic required for modern modulating heating appliances, helping to restore comfort and peak performance to your climate control system.
Type: Ignition Control Board
Size: Medium
Application: Used in residential and commercial gas furnaces, high-efficiency HVAC systems, and modulating heating units featuring direct spark ignition technology.
Specifications: Integrated direct spark ignition (DSI), modulating heat output control, flame sensing safety circuitry, diagnostic LED indicators, and multi-pin wiring harness compatibility.