The terminals are clearly marked: 'Herm' for the compressor lead

Optimized Solenoid Control: Ensures reliable water flow management by precisely switching the solenoid valve during call-for-humidity cycles

There is no functional or electrical difference

Key Benefits Linear Resistance Response: The PTC silicon sensor element provides predictable resistance changes

Bard HVAC 5651-191BX Expansion Valve 30067439-890 The terminals are clearly marked:The Bard 5651 191BX Expansion Valve is a critical thermostatic expansion valve (TXV) designed for precise refrigerant metering in Bard air conditioners and heat pump systems. Featuring 3 8" x 3 8" connection sizes, this component regulates liquid refrigerant flow into the evaporator coil based on cooling load requirements. This specific part is a direct replacement, confirmed identical to 5651 191, ensuring a seamless fit for technicians performing