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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
Common Questions: How do I know if this switch is failing
2-way normally closed solenoid valve specifically engineered for demanding HVACR steam and hot water applications
If the board receives power but fails to initiate the draft inducer or signal the igniter
providing a seamless field replacement for legacy systems
Lochinvar & A.O. Smith 100077872 Control 318172-701 Common Questions: How do IThe 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
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