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The AO SMITH 100093632 is a pressure switch kit designed for Polaris high-efficiency water heaters. The pressure switch monitors combustion airflow and venting conditions, opening the control circuit if safe operating pressures are not met. This prevents burner ignition when draft or combustion air is outside acceptable parameters. The kit provides the components needed to restore proper pressure sensing function in the appliance. Installation is typically performed by a licensed plumber or HVAC technician as part of a diagnostic repair or scheduled maintenance procedure.
This pressure switch kit is intended for use in Polaris high-efficiency gas water heaters, which are commonly installed in residential and light commercial applications. The Polaris line uses a sealed combustion, direct-vent design, and the pressure switch is a critical safety component within that venting system. Reference model series IS20210 when verifying fitment for a specific unit.
Designed as an OEM-style replacement pressure switch kit for Polaris high-efficiency gas water heaters, reference series IS20210.
This component should be installed by a licensed plumber or qualified HVAC technician. Shut off gas supply and disconnect electrical power to the water heater before beginning any service work. Inspect all vent connections and combustion air passages for obstructions before replacing the pressure switch, as blockages are a common cause of switch failure. Installation should conform to local codes and the appliance manufacturer service documentation.
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