Emerson Alco 066148 Expansion Valve 30067439-890 Leaving the stem engaged will

Leaving the stem engaged will prevent the solenoid coil from controlling the valve electronically

This HVAC control board manages the critical defrost cycle by monitoring coil temperature and compressor run time to prevent excessive ice accumulation on the evaporator

Precision Sensing: Features high-precision temperature sensing technology to minimize offset and prevent unnecessary equipment cycling

or an oversized furnace

Safety Integration: Features a spring return check function to ensure a known fail-safe position during power interruptions

Emerson Alco 066148 Expansion Valve 30067439-890 Leaving the stem engaged willThe Emerson Alco 066148 is a high capacity 12 ton thermostatic expansion valve (TXV) engineered for large scale heat pump and commercial air conditioning systems. This genuine Alco TFES12ZAA replacement features a balanced port construction that effectively compensates for fluctuating head pressures and varying evaporator loads, ensuring stable superheat control across a wide range of ambient conditions. Designed specifically for R410A refrigerant