Fenwal 35-605601-207 Control

The Fenwal 35-605601-207 is a specialized 24 VAC direct spark ignition (DSI) control designed for heavy-duty gas-fired appliances. Built with microprocessor-based ignition technology, this module ensures high-precision timing and reliable sequence management for natural, manufactured, and LP gas systems. It features a factory-set 30-second prepurge (30 SecPP) to clear the combustion chamber and a 15-second trial for ignition (15 SecTFI). The integrated DETECT-A-FLAME technology provides robust flame sensing with a 0.7 µA minimum threshold, while the on-board diagnostics LED allows for rapid field troubleshooting by identifying lockout conditions and system faults. This replacement ignition module is engineered for a temperature range of -40°F to 176°F, making it a dependable choice for commercial cooking equipment, furnaces, and boilers. As a 24V DSI module, it supports both local and remote flame sensing configurations, providing HVAC technicians with the versatility needed for diverse service applications.

• Enhanced Safety: High-speed 0.8-second flame failure response time for immediate gas valve de-energization.
• Precision Diagnostics: Diagnostic LED provides instant feedback on system status, reducing diagnostic time for HVAC contractors.
• Broad Compatibility: Certified for use with multiple fuel types including Natural Gas and Propane (LP).
• Advanced Microprocessor: Delivers +/- 5% timing accuracy, a significant upgrade over older analog controllers.
• Durability: Conformal-coated circuitry offers superior moisture resistance in demanding equipment environments.

How do I check the flame current on this module?
Using a DC microammeter, connect your leads to the FC+ and FC- test pins. A stable reading of at least 0.7 microamps is required to maintain the flame signal and prevent nuisance lockouts.

What is the reset procedure after an ignition lockout?
For this model, a manual reset is required. This can be accomplished by cycling the thermostat's call for heat or removing 24 VAC power from the control for at least 5 seconds.

Can this unit be mounted in any orientation?
Yes, the Fenwal 35-605601-207 is not position-sensitive and can be mounted either vertically or horizontally using standard sheet metal screws.

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.