These two part numbers refer to the exact same Warrick Series 26 control

outdoor sensors use different resistance curves and housing

To ensure a proper seal

making it efficient for high-volume output applications while maintaining system-wide pressure stability

Its direct-coupled design simplifies installation on damper shafts from 1/4” to 5/8”

Carrier EA52PH059 Piston 318973-401 These two part numbers referThe Carrier EA52PH059 Piston is a precision engineered fixed orifice metering device designed for specific Carrier, Bryant, and Payne residential evaporator coils. As a critical component in the refrigerant circuit, this 0. 059 inch orifice piston ensures the correct pressure drop and flow rate of R 410A refrigerant into the evaporator header. For contractors performing HVAC piston replacement, the EA52PH059 provides a reliable, mechanical alternative