Modine 5H0797490000 Control Board

The Modine 5H0797490000 Control Board is a critical OEM Direct Spark Ignition (DSI) module designed for high-stakes commercial and industrial heating applications. Built for 1-stage natural gas systems, this ignition control board is a drop-in replacement for part number 5H079749. It is the primary logic controller for the Modine Hot Dawg HD and HDS series, as well as PTS, PTP, and PTC unit heaters. By managing the ignition sequencing, flame sensing, and safety circuit monitoring, this board eliminates issues like intermittent ignition failure or hard lockouts caused by signal degradation. The 24V control circuit interface integrates seamlessly with existing inducer assemblies and gas valves, ensuring precise flame rectification and timing. When performing a Modine 5H0797490000 replacement, verify that the 24VAC transformer and flame sensor are within spec to prevent premature board failure. This HVAC furnace control board is engineered for the rugged environments typical of warehouse and garage unit heaters.

Key Benefits

• OEM Compatibility: Exact factory replacement for Modine 5H079749, ensuring full compatibility with Hot Dawg unit heaters manufactured after May 2007.
• Enhanced System Safety: Monitors flame status LEDs and safety limits, triggering a soft lockout if a call for heat fails to establish a flame.
• Simplified Installation: Features standard Molex connectors for rapid field swaps, reducing downtime on-site for contractors.
• Precision Timing: Optimized for single-stage natural gas operations, providing consistent direct spark ignition and post-purge cycles.

Common Questions

Is the 5H0797490000 compatible with older Hot Dawg models?
This board is designed for units featuring DSI ignition systems. For HD and HDS models, it typically fits units produced after May 2007. Always verify your specific model and serial number before installation.

How do I troubleshoot a 1-flash LED code on this board?
A single flash typically indicates an ignition failure. You should inspect the DSI ignitor for cracks, ensure the flame sensor is clean, and verify that the gas valve is receiving the 24V signal during the trial for ignition.

Can this board be used for LP (Propane) conversions?
While the board controls the ignition timing, fuel type compatibility (Natural Gas vs. Propane) depends on the gas valve and orifice kit. This board is technically rated for natural gas 1-stage logic but functions as the controller in many field-converted Modine units.

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.