Lochinvar & A.O. Smith 100277781 Control 320788-702 and 8-13 psi ranges

and 8-13 psi ranges

If the Aaon P81570 fails to close at 140°F

preventing catastrophic motor failure and overheating

this SPST (Single Pole Single Throw) control offers the reliability required for consistent heat cycles and minimal thermal overshoot in professional food service environments

Precise Calibration: Fixed

Lochinvar & A.O. Smith 100277781 Control 320788-702 and 8-13 psi rangesThe Lochinvar 100277781 Control (Model FB751 1251) is an integrated control board engineered specifically for Crest Heating Boilers. As a critical OEM replacement part, this module manages the firing sequence, ignition control, and safety parameters for high efficiency hydronic systems. This model is a direct boiler part replacement for units with serial numbers beginning with 4015, ensuring seamless integration with existing HVAC wiring harnesses and