Lochinvar & A.O. Smith 100077872 Control 318172-701 Using a switch with a

Using a switch with a different pressure setting can lead to unsafe combustion conditions or frequent nuisance trips

10" WC rating signify

If the board receives power but fails to initiate the draft inducer or signal the igniter

Optimized Wattage: The 11W draw provides the necessary induction for high-pressure lifts while maintaining lower operating temperatures

Lochinvar & A.O. Smith 100077872 Control 318172-701 Using a switch with aThe 100077872 (GSW 52720) is a genuine OEM hot surface ignition (HSI) control specifically engineered for select Lochinvar and A. O. Smith gas fired water heaters. As a veteran grade electronic ignition module, this component manages the critical timing sequences for the ignitor warm up, gas valve actuation, and flame rectification sensing. It operates on a 24 VAC control circuit, integrating high performance microprocessor logic to ensure precise