Modine 5H0781260001 Control Board

The Modine 5H0781260001 Control Board is a high-performance OEM replacement control board engineered for the Modine Hot Dawg HD Series, specifically models HD30, HD45, HD60, and HD75. This Series 103 terminal board serves as the updated version of the 5H78126-1, consolidating the functions of the legacy 5H75028 terminal board and 5H75039 time delay relay into a single, efficient assembly. Designed for gas-fired unit heater applications, the board manages critical ignition control sequences, flame sensing, and fan operation, while providing integrated diagnostics to streamline troubleshooting on the job site. This direct-replacement part ensures HVAC system reliability by utilizing advanced circuitry to track safety sensors and switches, automatically initiating shutdown protocols if dangerous conditions are detected. For field professionals, this board offers a seamless transition from older 101 and 102 series components, maintaining the exact footprints and connections required for Modine unit heaters.

Key Benefits

• Direct OEM replacement for Modine 5H78126-1 and older terminal/relay combinations.
• Consolidates ignition and time-delay functions to maximize energy efficiency and system reliability.
• Features on-board diagnostics with indicator lights for rapid fault identification during service.
• Enhanced microprocessor technology specifically tuned for hot surface ignition systems.
• Robust construction designed to withstand the thermal stresses of industrial and commercial heating units.

Common Questions

Is the 5H0781260001 compatible with older Modine HD models?
Yes, this Modine control board replaces the 5H78126-1 and serves as the modern alternative for the older 5H75028 terminal board and 5H75039 time delay relay used in early HD series heaters.

Why is the blower fan on my Modine heater starting too early?
Inconsistent fan timing or short cycling often points to a failing time delay relay or a logic error in the control board. Replacing the unit with a 5H0781260001 restores the correct sequence for heat exchange and fan activation.

Can this board be used for troubleshooting diagnostic codes?
Yes, the board includes LED indicators that flash specific codes to help identify issues with the pressure switch, flame signal, or power exhauster, reducing the time spent on trial-and-error repairs.

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.