The Fenwal 35-725205-021 Direct Spark Ignition Control Module is a reliable ignition control designed to manage safe and efficient burner ignition in gas-fired HVAC equipment. Operating on 120V, it features a three-try ignition sequence, zero-second prepurge, and a four-second trial for ignition (TFI) with a durable potted construction for enhanced protection. Commonly used in furnaces, unit heaters, boilers, and commercial heating systems, this control module helps ensure dependable startup, improves system safety, minimizes ignition failures, and supports consistent heating performance while reducing maintenance needs and equipment downtime.
