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Durable Construction: High-grade ceramic insulator and specialized metal rod resist thermal stress in high-temperature combustion chambers
or the LED status light remaining dark while 24V power is supplied to the board
10" WC rating signify
Using a switch with a different pressure setting can lead to unsafe combustion conditions or frequent nuisance trips
providing a seamless field replacement for legacy systems
Lochinvar & A.O. Smith 100077872 Control 318172-701 Durable Construction: High-grade ceramic insulatorThe 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