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As a direct Fasco D959 replacement for the York S1-026-32588-047 and Century 959
it is standard practice for a licensed HVAC contractor to inspect the primary and secondary limits for carbon tracking or pitting during replacement to ensure the safety circuit remains intact
Hermetic Seal Integrity: Specially formulated PTFE seats and dual O-ring stem seals prevent refrigerant leaks and moisture ingress
V46AD-4 is identical to V46AD-4C
Utilizing high-temperature resistant materials
Lennox 14A45 Pressure Switch 319847-401 As a direct Fasco D959The Lennox 14A45 Pressure Switch is a high precision, two stage OEM furnace replacement designed to ensure safe ignition and optimal inducer airflow. This dual pressure switch is factory calibrated with specific set points of . 50" and . 90" WC, acting as a critical safety limit that confirms the draft inducer is pulling sufficient vacuum before allowing the gas valve to open. As a direct replacement for the legacy Lennox 103613 03 and UniControl
