Fenwal 35-655605-013 Control

The Fenwal 35-655605-013 Control is a microprocessor-based 24V Hot Surface Ignition (HSI) module engineered for precise sequence management in gas-fired heating equipment. This OEM-grade ignition board features a three-trial ignition (3TRY) sequence and 7-second Trial for Ignition (TFI) period, ensuring reliable burner light-off even in demanding environments. Designed with 0 seconds of pre-purge (0sPP), it provides immediate ignitor heat-up upon a call for heat, making it an ideal choice for systems requiring rapid response. The microprocessor logic continuously monitors the flame signal and safety circuits, utilizing on-board diagnostics with a dedicated LED to provide real-time status and simplify troubleshooting for field technicians. This control supports direct replacement for numerous 24VAC HSI applications, managing the gas valve and sensing flame through local or remote sensing configurations with a minimum flame current of 0.7 microamps for stable operation.

• Enhanced Reliability: The three-trial ignition sequence allows for multiple start attempts before entering a 15-second inter-purge and subsequent lockout.
• Advanced Diagnostics: Built-in diagnostic LED flashes specific codes to identify airflow faults, internal failures, or flame loss without external tools.
• Precise Timing Control: Microprocessor-driven 7-second TFI and 0-second pre-purge deliver consistent performance and maximize heating efficiency.
• Field Versatility: Compatible with 24VAC gas valves and various hot surface ignitors, offering a broad HVAC part compatibility range for furnaces and boilers.

What do the LED codes on the Fenwal 35-655605-013 signify?
The diagnostic LED indicates system status: a steady on or specific flash patterns communicate normal operation, ignition lockout, or internal component faults to streamline service calls.

Can I use this board to replace an obsolete 05-246266-203 module?
Yes, the 35-655605-013 is the primary replacement ignition control for that model. Note that older wiring harnesses may require updating to standard quick-connect terminals.

Will this work with Trane or American Standard units?
While functionally similar, specific brand-labeled units often require a proprietary HSI control board kit (like the KIT9163). Verify the original part number before installation.

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.