773-102

This premium two-stage air pressure switch is a vital safety component designed for high-efficiency gas furnaces and HVAC systems. As an essential air-proving switch, it monitors the static pressure generated by the inducer blower motor to ensure proper venting of combustion gases. Specifically calibrated for dual-stage heating units, it features two distinct set points to accurately regulate both low-fire and high-fire operations. If your heating system is experiencing ignition failure or displaying pressure switch lockout codes, this replacement part provides the reliability needed to restore safe and efficient performance. Built to withstand the rigors of residential heating cycles, it prevents the burner from firing if dangerous venting conditions or blockages are detected, protecting your home and equipment.
Type: Air Pressure Switch
Size: Small
Application: Used in 2-stage residential forced-air gas furnaces and high-efficiency HVAC units to prove inducer motor draft and monitor venting safety.
Specifications: Dual-stage configuration; Low-stage set point: 1.02" WC; High-stage set point: 1.57" WC; Normally open contacts; Designed for vacuum or differential pressure sensing.