Lochinvar & A.O. Smith 100077872 Control 323080-701 this is an OEM 2-stage

this is an OEM 2-stage HSI board specifically designed to handle the high-stage and low-stage gas valve signals and blower speeds required for 2-stage heating systems

or debris within the diaphragm housing

Key Benefits Precise Combustion Control: Accurately monitors the premix gas/air arm to ensure the stoichiometric ratio is maintained for peak efficiency

Does this damper require a specific zone panel

the 100112148 is the go-to solution for troubleshooting ignition failures and short-cycling issues

Lochinvar & A.O. Smith 100077872 Control 323080-701 this is an OEM 2-stageThe 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