Reznor 214979 Ignition Board

The Reznor 214979 Ignition Board is a critical direct spark ignition (DSI) controller engineered for precise gas-fired combustion management in industrial and commercial heating systems. As the primary furnace control board for high-efficiency models like the Reznor UDAP, UDAS, and PDH series, this OEM DSI integrated control regulates the entire startup sequence, including inducer motor verification via the pressure switch and timed gas valve activation. This replacement ignition module features advanced diagnostic capabilities with integrated LED flash codes to streamline field troubleshooting for service technicians. By utilizing genuine Reznor heater parts, contractors ensure exact HVAC part compatibility and logical safety monitoring, protecting the system from ignition lockouts or flame sensing failures. Its robust architecture is designed to handle the thermal cycling and electrical demands of warehouse and workshop environments without compromising timing accuracy.

Key Benefits

• OEM Precision Compatibility: Purpose-built for Reznor unit heaters, ensuring the board mounts directly to factory standoffs and integrates with existing wiring harnesses.
• Diagnostic LED Codes: Features dual LED indicators that provide specific flash sequences to identify pressure switch failures, flame sensing issues, or internal faults.
• Safety Monitoring Logic: Actively monitors flame current and interacts with safety limits to provide reliable hard lockouts during unsafe ignition attempts.
• Efficient DSI Sequencing: Optimizes gas valve timing and spark frequency to ensure clean ignition and stable flame rectification.

Common Questions

What do the LED flash codes signify on this board?
The integrated LEDs provide critical feedback; for instance, a fast flash often indicates a pressure switch failing to close within 30 seconds of venter motor energization, while other codes signal lockouts from multiple failed ignition attempts or weak flame signals.

Does this board replace older ignition modules in the Reznor series?
Yes, the 214979 is the current production ignition control board that replaces several legacy versions in UDAP and UDAS units; however, it is standard practice to verify the specific wiring diagram inside your unit's access panel before installation.

Can I test the board before deciding on a replacement?
Before condemning the board, always check the 24 VAC supply at the transformer and ensure the on-board fuse is intact, as external shorts in the thermostat wiring or inducer motor can mimic a control fault.

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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.