Fenwal 35-679908-153 Ignition Module

As a veteran tech, you know that reliability in commercial high-demand systems is non-negotiable. The Fenwal 35-679908-153 Ignition Module is a microprocessor-based Hot Surface Ignition (HSI) control specifically engineered for gas-fired appliances with combustion chambers exceeding 400K BTU. This rugged 24 VAC ignition control features an integrated combustion blower relay and is designed for proven HSI applications. It delivers precise, repeatable timing sequences, including a 15-second pre-purge, 15-second inter-purge, and 7-second Trial for Ignition (TFI). The Fenwal 35-679908-153 utilizes remote sense technology and a manual reset logic to meet ASME CSD-1 compliance standards, ensuring maximum safety in industrial environments. With on-board LED diagnostics, you can quickly identify internal control failures, airflow faults, or ignition lockouts, significantly reducing downtime during service calls. Whether you are performing a Fenwal ignition module replacement or upgrading a legacy system, this module provides the heavy-duty performance required for commercial burner controls and high-output boilers.

• ASME CSD-1 Compliant: Engineered for industrial and commercial appliances over 400,000 BTU requiring high-safety standards.
• Advanced Diagnostics: On-board LED provides immediate fault codes for flame signal issues, pressure switch faults, and low voltage.
• Combustion Blower Control: Integrated relay simplifies wiring by managing the blower output directly from the module.
• Microprocessor Precision: Delivers consistent 15-second pre-purge and 7-second TFI timings to prevent fuel buildup and nuisance lockouts.
• Remote Flame Sensing: Utilizes a dedicated remote sensor for superior flame monitoring accuracy in high-temperature environments.

What does it mean when the LED flashes 3 times?
A 3-flash LED code indicates an ignition lockout. This typically occurs after 3 unsuccessful trials for ignition (TFI). You should check the gas supply, inspect the hot surface ignitor for cracks, and ensure the flame sensor is clean and properly positioned.

Can I use this module to replace a 35-61 or 35-60 series control?
While the 35-67 series shares some similarities with previous models, the 35-679908-153 features specific timings and a manual reset requirement for CSD-1 applications. Always verify the terminal designations and timing requirements before attempting a cross-reference swap.

Does this unit support local or remote sensing?
This specific model is designed for remote flame sensing. It requires a separate flame probe to monitor the burner flame, which is standard for higher BTU commercial equipment to ensure the most stable signal.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.