Fenwal 35-605606-115 Control

The Fenwal 35-605606-115 is a 24VAC microprocessor-based Direct Spark Ignition (DSI) control designed for precise burner supervision in gas-fired HVACR equipment. This unit is engineered for heavy-duty applications, providing a 15-second pre-purge, a 10-second trial for ignition (TFI), and three ignition attempts before safety lockout. As a veteran-grade ignition control module, it features Detect-A-Flame technology for sensitive flame rectification (0.3 µA minimum) and a robust conformal coating that ensures reliable operation in high-humidity environments up to 95% RH.

This module serves as a direct cross-reference for several critical OEM parts, including IGN0109, 6402601, and C64026-1. It is compatible with natural, LP, and manufactured gases, making it a versatile solution for boilers, furnaces, and commercial water heaters. The diagnostic LED provides real-time fault codes to streamline troubleshooting for field technicians. With a flame failure response time of less than 0.8 seconds, the Fenwal 35-605606-115 delivers the high-speed safety shut-off required for industrial and commercial heating systems.

Key Benefits

• Multi-Try Ignition: Three-try sequence maximizes burner startup reliability in cold-start conditions.
• Durable Construction: Conformal-coated circuit board protects against moisture and vibration.
24VAC Direct Spark Ignition (DSI) control.
• Diagnostic Intelligence: On-board LED simplifies troubleshooting by identifying system faults immediately.
• Compatibility: Direct technical replacement for IGN0109 and 6402601.

Common Questions

What does the 15-second pre-purge do?
The pre-purge period clears the combustion chamber of residual gas before the spark is energized, ensuring a safe and controlled ignition cycle.

Can I use this for both natural gas and propane systems?
Yes, the Fenwal 35-605606-115 is rated for use with natural gas, LP (propane), and manufactured gas types.

How do I reset the module if it goes into lockout?
Lockout can be reset by cycling the 24VAC power at the thermostat or by removing power to the control for at least 5 seconds.

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.