Description
The Fenwal 35-63J101-011 is a high-quality 24 VAC microprocessor-based intermittent pilot ignition control designed to provide reliable spark-to-pilot ignition and flame supervision in gas-fired HVAC equipment. Built to directly replace older Johnson Controls G77x series modules, this ignition control board delivers precise timing, full flame sensing, and on-board diagnostics to ensure safe, efficient combustion and easier troubleshooting.
Key Features
- Microprocessor-Based Ignition Logic – Controls spark generation and flame sensing with repeatable timing for reliable operation across heating cycles.
- Intermittent Pilot Operation – Designed to manage spark-to-pilot ignition for gas furnaces, unit heaters, water heaters, and commercial cooking equipment.
- 24 VAC Control Voltage – Compatible with standard HVAC low-voltage systems.
- Custom Timing Options – Supports configurable pre-purge, inter-purge, and Trial-For-Ignition (TFI) settings depending on the specific variant of the module.
- Full Flame Sensing with Safety Logic – Detects flame presence and safely shuts down on flame failure to protect equipment and occupants.
- Diagnostic LED Feedback – Integrated diagnostic LEDs help technicians quickly identify ignition or flame-sense issues.
- Direct Replacement Fit – Drop-in replacement for Johnson Controls G77x series ignition modules, maintaining the same footprint, mounting, and wiring connections.
