Fenwal 35-655006-011 Control

The Fenwal 35-655006-011 Ignition Control is a microprocessor-based hot surface ignition (HSI) module engineered for high-performance gas-fired HVAC and boiler applications. As a veteran-grade 24V gas burner control, this unit integrates combustion blower control, airflow monitoring, and precise flame sensing into a single, compact footprint. This specific Fenwal 35-65 series model is configured for no pre-purge (0 seconds) operation with a 4-second Trial for Ignition (TFI) and a 3-try ignition sequence to ensure reliable startup in demanding environments.

Designed for professional field flexibility, the module features 120/240V field-selectable line voltage, allowing for seamless integration with various igniter types. The onboard diagnostic LED provides immediate fault code feedback, significantly reducing troubleshooting time for technicians. Built with a -40°F to 176°F operating temperature range, it maintains stable flame current detection (0.7 μA minimum) across natural, propane, and manufactured gas systems. Whether used as an OEM HVAC replacement part or a system upgrade, this control provides rigorous safety monitoring and automatic reset capabilities.

Key Benefits for Technicians:

• Broad Compatibility: Supports 120V and 240V hot surface igniters through field-selectable terminals.
• Advanced Diagnostics: System diagnostic LED simplifies identifying ignition lockouts or airflow switch failures.
• Robust Design: Potting or high-quality enclosure protects the microprocessor ignition control from moisture and vibration.
• Precision Timing: Repeatable 4-second TFI and 3-try sequence prevents nuisance lockouts while maintaining strict safety standards.
• Service Friendly: Features dedicated flame current test pins for accurate microamp readings without breaking the circuit.

Common Questions:

What does 'NO PP' signify in the 35-655006-011 specifications?
'NO PP' indicates there is no pre-purge delay. The control immediately initiates the igniter heat-up period upon a call for heat once safety limits are verified.

Can this module replace older Fenwal 05-24 or 05-32 series controls?
Yes, the Fenwal 35-65 series is the professional-grade replacement for many legacy 05-series ignition modules, though wiring harness adaptations may be required depending on the original pin configuration.

How do I reset the control after an ignition lockout?
The module can be reset manually by cycling the thermostat or removing the 24V power for 5 seconds. This model also features an automatic 1-hour reset thermal cycle.

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.