Amana-Goodman B1809913S HSI Board R-410A For integration into existing 1/4"

For integration into existing 1/4" systems

As a standard for HVACR technicians and contractors

provided the vent pipes are clear and the switch itself is functional

this specific Watts 0780021 is exclusively for agricultural water float valves

this TXV is specifically calibrated for R410A refrigerant pressures and should not be used in R22 systems due to different pressure-temperature requirements

Amana-Goodman B1809913S HSI Board R-410A For integration into existing 1/4"The Amana Goodman B1809913S HSI Board is a critical OEM replacement control board engineered for precision timing in hot surface ignition sequences. Designed to interface via a specialized 9 pin connector, this integrated module manages the inducer fan motor, gas valve, and blower motor cycles within Amana and Goodman furnace models. This microprocessor based board stabilizes the ignitor output and monitors flame sensor inputs to ensure safe,