Carrier EF17BZ271 Reversing Valve THPU32HP7Y the SM120-4VI is functionally identical

the SM120-4VI is functionally identical to part numbers P040-12571

Efficient Staging: Supports 2-stage gas valve operation with adjustable staging delays to maximize homeowner comfort and fuel efficiency

if the device fails the backpressure test on the second check

use the included mounting brackets to weave the element horizontally across the face of the coil

For field durability

Carrier EF17BZ271 Reversing Valve THPU32HP7Y the SM120-4VI is functionally identicalThe Carrier EF17BZ271 Reversing Valve is a critical 4 way pilot operated refrigerant control designed for high performance heat pump systems. Engineered as a direct replacement for 1175622, this OEM component features a 1 2" x 7 8" ODF (Outer Diameter Flare) connection, facilitating precise directional control of refrigerant flow to switch between heating and cooling cycles. Operating on a standard 24V solenoid coil, this valve is a Factory Authorized