Fenwal 35-605601-103 Control

The Fenwal 35-605601-103 is a microprocessor-based 24V Direct Spark Ignition (DSI) control engineered for precision timing and safety in gas-fired appliances. Built for the rigors of commercial cooking, boilers, and furnaces, this ignition module features a 15-second pre-purge to clear the combustion chamber and a 7-second trial for ignition (TFI) to ensure reliable flame establishment. As a veteran-grade HVAC control board, it utilizes DETECT-A-FLAME technology for robust flame sensing and includes on-board LED diagnostics to streamline troubleshooting for field technicians. The module supports both local and remote flame sensing and provides flame current test points for accurate signal monitoring. Designed to withstand demanding environments, it operates within a temperature range of -40°F to 176°F and is compatible with natural, LP, and manufactured gases. This rugged DSI ignition control ensures repeatable sequencing and safe lockout performance, making it a critical component for maintaining high-efficiency combustion systems.

• Precise Microprocessor Control: Delivers consistent 15-second pre-purge and 7-second TFI sequences for optimized burner safety.
• Advanced Diagnostics: Integrated LED flash codes allow for rapid identification of ignition failures or flame sense issues.
• Versatile Application: Designed to manage gas valves in commercial water heaters, gas furnaces, and high-duty heating equipment.
• Flame Signal Monitoring: Features dedicated FC+ and FC- test pins to measure microamps without breaking the circuit.
• Reliable Enclosure: Housed in a Noryl grey enclosure for protection against moisture and high-temperature HVAC environments.

How do I reset the control after a lockout?
On this single-trial model, a lockout requires a manual reset by cycling the 24 VAC power or resetting the thermostat for at least 5 seconds.

What does a steady LED light or specific flash code mean?
The on-board LED indicates system status; a specific number of flashes correlates to faults such as "No Flame Detected" or "Internal Control Failure," as detailed in the technical data sheet.

Can this module be used with remote flame sensing?
Yes, the 35-605601-103 supports both local sense through the spark electrode and remote sensing via a separate flame probe to suit various burner configurations.

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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.