The larger 3/4" outlet accommodates the higher BTU requirements of heavy-duty furnaces

As a genuine Trane OEM replacement part

For contractors servicing high-efficiency residential systems

it minimizes system downtime by accurately managing voltage distribution across the furnace control circuitry

featuring a critical modification to the electrical connection for enhanced compatibility and ease of installation

Fenwal 35-704903-001 Control 30067439-890 The larger 3/4" outlet accommodatesThe Fenwal 35 704903 001 is a microprocessor based Direct Spark Ignition (DSI) control designed for 120VAC gas fired equipment. This single try ignition module features a 4 second Trial for Ignition (TFI) period, offering precise timing for commercial heating and industrial process applications. Engineered for reliability in demanding environments, the Fenwal 35 70 series utilizes specialized circuitry to monitor the flame via flame rectification,