Lochinvar & A.O. Smith 100277781 Control 326058-755 The pilot-operated mechanism uses the

The pilot-operated mechanism uses the refrigerant pressure differential to assist the valve in opening

Most failures in the field stem from voltage spikes

Direct OEM Compatibility: Verified replacement for 20293901 and 620880 ensures precise fitment in specified Goodman heat pumps

ensuring calibrated gas flow and optimal BTU output for consistent combustion

Rugged Silver Contacts: Equipped with high-conductivity silver contact material for a 10 Amp load rating and long-term switching reliability

Lochinvar & A.O. Smith 100277781 Control 326058-755 The pilot-operated mechanism uses theThe 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