Why is my one-pipe thermostat failing to regulate branch pressure

Can this be used on a heat pump

The Amana-Goodman 0259F00007P Wiring Harness is a critical 12-pin OEM replacement component engineered specifically for GDS8 series gas furnaces

and lighting arrays

The orifice must be selected and purchased separately based on the required tonnage

York S1-025-29139-002 Pressure Transducer Freon Why is my one-pipe thermostatThe York S1 025 29139 002 Pressure Transducer is a critical OEM replacement part engineered for precise refrigerant monitoring in York unitary systems. This high accuracy refrigerant pressure sensor features a standard 1 4" SAE flare nut connection and is rated for a 0 200 PSI range, making it ideal for monitoring suction line conditions or low side system pressures. As a veteran grade HVAC transducer, it operates on a 5V DC supply voltage, delivering