Lochinvar & A.O. Smith 100166244 Pressure Switch 30067439-890 SPDT switch logic provides flexibility

SPDT switch logic provides flexibility to wire for open-on-rise or close-on-rise sequences

the ignitor has likely failed and requires replacement

maintaining UL/CSA listing integrity

provided the MFD ratings match exactly

This industrial pressure switch operates with an open-low action

Lochinvar & A.O. Smith 100166244 Pressure Switch 30067439-890 SPDT switch logic provides flexibilityThe Lochinvar & A. O. Smith 100166244 is a critical OEM boiler replacement part engineered for precise air pressure monitoring within high efficiency heating systems. This 1. 06" WC SPDT pressure switch is a factory certified component designed to ensure the inducer motor or blower is generating sufficient draft before allowing the ignition sequence to proceed. As a Single Pole Double Throw (SPDT) configuration, it provides versatile switching logic,