Fenwal 35-655500-001 Control

The Fenwal 35-655500-001 is a microprocessor-based 24VAC hot surface ignition control designed for precise flame management in gas-fired equipment. Engineered as a robust HSI ignition module, this unit provides a 4-second Trial for Ignition (TFI) with a single-try sequence, ensuring reliable burner light-off in systems without pre-purge requirements. As a high-performance HVAC replacement part, it features on-board LED diagnostics to streamline troubleshooting for field technicians, identifying airflow faults or flame sensing issues instantly. This control is the direct Fenwal 35-655500-001 replacement for legacy models 35-655520-001, 05-316226-051, and 05-316226-052. Utilizing safe start technology, the module monitors the demand for heat and flame rectification (0.7 microamps minimum) to maintain safe combustion. Its compact design and 24V NO PP configuration make it a staple for contractors servicing commercial boilers, furnaces, and water heaters. Integrating this gas burner control ensures repeatable timing and high-energy ignition across various atmospheric burner applications.

Key Benefits:

• Broad Compatibility: Serves as the primary Fenwal 35-655500-001 replacement for obsolete 05-316226-051 and 35-655520-001 modules.
• Advanced Diagnostics: Integrated LED diagnostic codes reduce downtime by providing clear visual indicators for system lockouts or sensor failures.
• Precision Timing: Microprocessor control delivers a consistent 4-second Trial for Ignition (TFI) and 20-second heat-up period.
• Reliable Sensing: Remote or local flame sensing capabilities with a minimum sensitivity of 0.7 microamps for stable operation.

Common Questions:

What does the single-try TFI mean for system resets?
In a single-try configuration, if the Fenwal 35-655500-001 fails to sense a flame within the 4-second window, it enters a safety lockout. To reset, the technician must cycle the 24VAC power or adjust the thermostat for 5 seconds.

Is this control compatible with 120V ignitors?
While the control system operates on 24VAC, certain models in the 35-65 series support field-selectable line voltage. Always verify your specific wiring diagram to ensure the ignitor voltage matches the module's output capability.

How do I troubleshoot a 3-flash LED code?
A 3-flash error typically indicates an ignition lockout. Check the hot surface ignitor for continuity, verify gas pressure at the valve, and ensure the flame sensor is clean and properly grounded.

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.