Fenwal 35-63J103-017 Control

The Fenwal 35-63J103-017 Control is a specialized 24 VAC intermittent pilot ignition control engineered to serve as a direct-fit Johnson G77x replacement. For contractors managing legacy systems, this module provides a seamless transition by matching the exact footprint, mounting hole patterns, and wiring configurations of the discontinued Johnson Controls G77x series. This microprocessor-based control features a 0-second prepurge and an 85-second trial for ignition (TFI), ensuring rapid response in commercial cooking equipment, unit heaters, and gas furnaces. The 35-63J series utilizes a high-energy spark for reliable burner Lite-Off and a superior 120V flame sense signal to prevent nuisance lockouts. With on-board diagnostics via a dedicated LED, technicians can quickly identify internal failures or ignition lockout states without external tools. The board is conformal coated for moisture resistance and supports both local and remote flame sensing, making it a versatile HVACR ignition module for natural, LP, or manufactured gas applications.

• Direct Drop-In Replacement: Specifically designed to replace Johnson Controls G77x series with no modifications to mounting or wiring.
• Enhanced Troubleshooting: Integrated diagnostic LED provides instant fault code feedback for faster field service.
• Robust Flame Sensing: Features a 120V flame sense signal for increased reliability compared to standard 24V designs.
• Safe Start Technology: Performs a hardware and software self-check on every call for heat to ensure system integrity.
• Flexible Grounding: Equipped with three ground terminals to simplify wiring in complex commercial installations.

Can I use this to replace a Johnson G76x series control?
No, the 35-63J is specifically an intermittent pilot (IP) replacement for the G77x. For direct spark ignition (DSI) applications involving the G76x, you should utilize the Fenwal 35-60J series.

What do the LED codes indicate?
A steady ON LED indicates an internal control failure, while specific flash patterns identify issues such as airflow faults, erroneous flame signals, or ignition lockout after the 85-second TFI expires.

Is this control sensitive to mounting position?
The 35-63J is not position-sensitive and can be mounted horizontally or vertically to accommodate tight cabinet spaces in commercial fryers or heaters.

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.