Fenwal 35-655205-011 Control

Ensure reliable combustion management with the Fenwal 35-655205-011, a microprocessor-based Hot Surface Ignition (HSI) control module designed for high-efficiency gas-fired appliances. This 24V ignition board is engineered for precision, featuring a 4-second Trial for Ignition (TFI) and a 3-try ignition sequence to provide consistent burner light-off in demanding environments. Designed without a pre-purge requirement (NO PP), it transitions immediately to the heat-up phase upon a call for heat, optimizing system response time. The integrated 15-second inter-purge (15IP) ensures safe clearing of unburnt gas between ignition attempts, significantly reducing the risk of delayed ignition or hardware stress. As a veteran-grade HVAC replacement part, this module utilizes advanced flame sensing technology and on-board LED diagnostics for rapid troubleshooting of lockout conditions or airflow faults. Whether you are servicing industrial furnaces, water heaters, or pool heaters, the Fenwal 35-65 series provides the robust performance and technical reliability required for professional-grade heating system maintenance.

• Microprocessor Accuracy: Provides repeatable timing for ignition and purge cycles, ensuring stable flame monitoring.
• Multi-Try Logic: Includes 3 trials for ignition to maximize reliable start-ups before triggering a safety lockout.
• Diagnostic LED: Simplifies field service by indicating specific fault codes for power, ignition, and flame signals.
• Universal Mounting: Compact design and non-position-sensitive orientation allow for easy HVAC control board integration.
• Broad Compatibility: Suitable for a wide range of 24 VAC gas burner applications under 400K BTU, including LP and Natural Gas systems.

What does the 15IP specification mean for system safety?
The 15-second inter-purge (15IP) is a critical safety timing that allows the combustion blower to clear the combustion chamber for 15 seconds after a failed ignition attempt before the next 4-second TFI begins.

How do I reset the module after an ignition lockout?
A manual reset is required. This is achieved by either cycling the thermostat below room temperature or removing the 24V power source for at least 5 seconds to clear the ignition lockout code.

Can this control be used with both 120V and 24V ignitors?
This specific model is a 24V control; however, it is frequently used in systems that may utilize field-selectable line voltage for the ignitor segment. Always verify your specific wiring diagram and ignitor voltage requirements prior to 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.